# Racunarske Mreze I Kolokvijum (I Deo)

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• 1.

### Elekticni impulsi su podrazumevani nosioci signala u:

• A.

Kablova sa optickim vlaknima

• B.

Kablovima sa upredenim paricama

• C.

Koaksijalnim kablovima

• D.

IrDA sistema prenosa

B. Kablovima sa upredenim paricama
C. Koaksijalnim kablovima
Explanation
Electric impulses are the default signal carriers in twisted pair cables and coaxial cables. Twisted pair cables consist of pairs of insulated copper wires twisted together, while coaxial cables have a central conductor surrounded by an insulating layer, a metallic shield, and an outer insulating layer. These types of cables are commonly used for transmitting electrical signals in various communication systems. However, optical fibers use light signals instead of electric impulses to transmit data, and IrDA (Infrared Data Association) systems use infrared light for wireless communication. Therefore, the correct answer is twisted pair cables and coaxial cables.

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• 2.

### U sistemu strukturnog kabliranja definisano je da telekomunikaciona soba treba da se nalazi na istom spratu kao I :

• A.

• B.

Komunikacioni uredjaj najviseg nivoa u mrezi

• C.

Demarkciona tacka

• D.

Najveci broj korisnika

Explanation
According to the given information, in a structured cabling system, it is defined that the telecommunication room should be located on the same floor as the "radni prostor" (work space). This means that the telecommunication room should be in close proximity to the work area for efficient connectivity and communication purposes.

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• 3.

### Za standardizaciju javne telefonske mreze zaduzena je organizacija:

• A.

PTT

• B.

Medjunarodna Telekomunikaciona Unija(ITU)

• C.

IEEE

• D.

IETF

B. Medjunarodna Telekomunikaciona Unija(ITU)
Explanation
The correct answer is Medjunarodna Telekomunikaciona Unija(ITU). The ITU is responsible for the standardization of the public telephone network. PTT, IEEE, and IETF are not specifically responsible for the standardization of the public telephone network.

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• 4.

### Neki od najcescih uzroka gresaka pri prenosu podataka su:

• A.

Preslusavanje

• B.

Protokoli

• C.

Sintaksa

• D.

Beli Gausov sum

• E.

Impulsni sum

• F.

Eho

A. Preslusavanje
D. Beli Gausov sum
E. Impulsni sum
F. Eho
Explanation
The correct answer includes the terms "Preslusavanje" (eavesdropping), "Beli Gausov sum" (white Gaussian noise), "Impulsni sum" (impulse noise), and "Eho" (echo). These are some of the most common causes of errors in data transmission. Eavesdropping refers to unauthorized interception of data, while white Gaussian noise and impulse noise are types of interference that can corrupt the transmitted signal. Echo occurs when a reflected signal interferes with the original signal, causing distortion.

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• 5.

### U sistemu strukturnog kabliranja definisano je da kabl koji povezuje radnu stanicu sa uticnicom, kao I kabl koji povezuje razvodni panel sa mreznim uredjajima(patch kabl), ne bi trebalo da bude duzi od:

• A.

100 metara

• B.

90 metara

• C.

50 metara

• D.

5 metara

D. 5 metara
Explanation
The correct answer is 5 meters. In a structured cabling system, the maximum length for the cable connecting a workstation to the outlet and the cable connecting the patch panel to the network devices should not exceed 5 meters. This limitation is in place to ensure optimal performance and minimize signal loss in the network.

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• 6.

### Osnovne posredujuce uredjaje kod Frejm-relej tehnologije cine:

• A.

Komutator

• B.

Razvodnici

• C.

Mostovi

A. Komutator
Explanation
The correct answer is "Komutator". In Frejm-relej tehnologija, komutator is an essential component that acts as a switch, allowing the flow of current to different circuits. It helps in controlling the operation of the relay and enables it to switch between different contacts or circuits. Therefore, komutator plays a crucial role in the functioning of the basic intermediate devices in Frejm-relej technology.

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• 7.

### U aktivnu mreznu opremu spadaju:

• A.

Uticnice

• B.

Ruteri

• C.

Razvodnici

• D.

Kablovi

• E.

Komutatori

• F.

Pec-kablovi

• G.

Konektori

• H.

Kanalice

B. Ruteri
E. Komutatori
Explanation
The correct answer includes "Ruteri" and "Komutatori." These are both types of active network equipment. Ruteri, or routers, are devices that connect multiple networks together and route data packets between them. Komutatori, or switches, are devices that connect multiple devices within a local area network (LAN) and forward data packets between them. Both routers and switches play a crucial role in managing and directing network traffic, making them essential components of active network equipment.

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• 8.

### Dvodimenzionalna provera parnosti u odnosu na jednodimenzionalnu proveru parnosti:

• A.

Nema uticaja na otkrivanje I ispravljanje gresaka

• B.

Nudi manje mogucnosti za otkrivanje I ispravljanje gresaka

• C.

Nudi vece mogucnosti za otkrivanje I ispravljanje gresaka

C. Nudi vece mogucnosti za otkrivanje I ispravljanje gresaka
Explanation
The given answer states that a two-dimensional parity check offers greater possibilities for error detection and correction compared to a one-dimensional parity check. This implies that the two-dimensional method is more effective in identifying and fixing errors.

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• 9.

### Prevelika blizina kablova I frekvencijskih opsega(kao uzrok greske pri prenosu podataka) naziva se:

• A.

Intermodulacioni sum

• B.

Harmonijsko izoblicenje

• C.

Impulsni sum

• D.

Preslusavanje

D. Preslusavanje
Explanation
Preslušavanje refers to the interference or leakage of signals between cables or frequency ranges that are in close proximity to each other. This can cause errors in data transmission.

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• 10.

### Osnove racunarskih telekomunikacija I mreza predstavlja prenos:

• A.

Signala

• B.

Komunikacionih slojeva

• C.

Podataka

• D.

Protokola

• E.

Informacija

B. Komunikacionih slojeva
Explanation
The correct answer is "Komunikacionih slojeva" (Communication layers). This answer is correct because the question asks about the subject matter of the course "Osnove racunarskih telekomunikacija I mreza" (Basics of computer telecommunications and networks), and the subject matter of the course is the communication layers.

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• 11.

### Jednodimenzionalna provera parnosti omogucava pored otkrivanja I ispravljanje gresaka nastalih tokom prenosa podataka:

• A.

Smanjivanje kasnjenja

• B.

Ispravljanje gresaka

• C.

Otkrivanje gresaka

• D.

Duplo vece brzine prenosa

B. Ispravljanje gresaka
C. Otkrivanje gresaka
Explanation
Jednodimenzionalna provera parnosti omogućava otkrivanje i ispravljanje grešaka nastalih tokom prenosa podataka, što znači da može detektovati i popraviti greške u podacima.

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• 12.

### Veci broj dodatnih bitova cija je namena otkrivanje gresaka podrazumeva:

• A.

Prenos podataka vecim brzinama

• B.

Potrebu za vecim brojem komunikacionih slojeva

• C.

Manju efikasnost prenosa

• D.

Manju verovatnocu pojavljivanja greske

• E.

Bolju mogucnost otkrivanja gresaka

C. Manju efikasnost prenosa
E. Bolju mogucnost otkrivanja gresaka
Explanation
The presence of additional bits for error detection implies a decrease in the efficiency of transmission, as these extra bits increase the overall size of the data being transmitted. However, it also provides a better ability to detect errors, as these additional bits are specifically designed to identify any errors that may occur during transmission.

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• 13.

### OSI referentni model definise

• A.

6 slojeva

• B.

7 slojeva

• C.

5 slojeva

B. 7 slojeva
Explanation
The correct answer is 7 slojeva. The OSI referentni model defines a network architecture that consists of seven layers. Each layer has a specific function and interacts with the layers above and below it. These layers include the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. This model provides a framework for understanding and designing computer networks, ensuring interoperability between different systems and protocols.

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• 14.

### Koji od sledecih uzroka greske pri prenosu podataka najcesce podrazumeva nemogucnost dalje komunikacije?

• A.

Prekid linije

• B.

Impulsni sum

• C.

Beli Gausov sum

• D.

Prenos podataka sa komutacijom veza

• E.

Inkapsulacija

A. Prekid linije
Explanation
The most common cause of communication failure among the given options is a "Prekid linije" which means a line break or interruption in the transmission line. This can occur due to physical damage to the line or a disconnection, resulting in the inability to continue communication between the sender and receiver.

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• 15.

### Upadanje u frekvencijski opseg drugog komunikacionog kanala(kao uzrok gresaka pri prenosu podataka ) naziva se:

• A.

Beli Gausov sum

• B.

Impulsni sum

• C.

Harmonijsko izoblicenje

• D.

Intermodulacioni sum

D. Intermodulacioni sum
Explanation
Intermodulacioni sum se odnosi na upadanje signala iz jednog komunikacionog kanala u frekvencijski opseg drugog kanala, što može dovesti do grešaka pri prenosu podataka. Ova pojava se javlja kada se signali različitih frekvencija preklapaju ili mešaju, stvarajući nove frekvencije koje mogu ometati ili izobličiti originalne signale.

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• 16.

### Odbijanje signala I njegov povracaj do izvora(kao uzrok gresaka pri prenosu podataka) naziva se

• A.

Dziter

• B.

Harmonijsko izoblicenje

• C.

Eho

• D.

Poduzno slabljenje

C. Eho
Explanation
Eho refers to the reflection of a signal back to its source, causing errors in data transmission. This can occur when a signal encounters an obstacle or interference and bounces back to the sender. The reflected signal can interfere with the original signal, leading to errors in data transmission.

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• 17.

### Kod podataka u kome postoji paran broj bitova cija je vrednost 1 a kome je dodat kontrolni bit cija je vrednost 0 korisceni metod se naziva:

• A.

Longitudinalna relundantna provera

• B.

Neparna parnost

• C.

Parna parnost

• D.

Polinomijalna provera

C. Parna parnost
Explanation
The correct answer is "Parna parnost" because it refers to a method of error checking in which a control bit with a value of 0 is added to a data code with an even number of 1 bits. This control bit helps to detect errors in the transmission or storage of the data by ensuring that the total number of 1 bits (including the control bit) is always even. If the count of 1 bits is found to be odd, it indicates an error in the data.

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• 18.

### Naziv Ccarrier Sense Mutiple Access with Collision Detection(CSMA/CD) odnosi se na:

• A.

Internet

• B.

Eternet

• C.

Token-ring

B. Eternet
Explanation
The correct answer is Ethernet. CSMA/CD is a protocol used in Ethernet networks to avoid collisions between data packets. It allows multiple devices to share the same network medium by sensing if the medium is busy before transmitting data. If a collision is detected, the devices involved in the collision wait for a random period of time before retransmitting their data. Therefore, CSMA/CD is specifically related to Ethernet networks.

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• 19.

### Ruter Funkcionise na:

• A.

Mreznom sloju

• B.

Sloju aplikacije

• C.

Sloju veze

• D.

Fizickom sloju

• E.

Transportnom sloju

A. Mreznom sloju
Explanation
Ruter funkcionise na mreznom sloju. Mrezni sloj je odgovoran za uspostavljanje i odrzavanje veze izmedju razlicitih mreza. Ruteri koriste mrezne adrese da bi usmeravali podatke izmedju razlicitih mreza, tako da mogu da komuniciraju i razmenjuju informacije. Ruteri takodje mogu da koriste razlicite algoritme za usmeravanje kako bi odabrali najbolji put za slanje podataka.

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• 20.

• A.

Provera I uklanjanje kontrolnih podataka

• B.

Podela podataka u manje celina

• C.

Preuzimanje podataka sa medijuma za prenos

• D.

Sklapanje primljenih fragmenata

• E.

B. Podela podataka u manje celina
Explanation
The correct answer is "Podela podataka u manje celina, Adresovanje paketa." This is because dividing data into smaller units (data segmentation) and addressing packets are both tasks performed by the protocol on the sending computer. Data segmentation is necessary to break down large amounts of data into smaller, more manageable units for transmission, while addressing packets involves assigning unique identifiers to each packet so that they can be properly routed to their destination.

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• 21.

### Najvecu Racunarsku mrezu u navedenom skupu cini

• A.

Licna racunarska mreza(Personal Area Network, PAN)

• B.

Gradska Racunarska mreza(Metropolitan Area Network. MAN)

• C.

Lokalna racunarska mreza(Local Area Network, LAN)

B. Gradska Racunarska mreza(Metropolitan Area Network. MAN)
Explanation
The correct answer is Gradska Racunarska mreza (Metropolitan Area Network, MAN). A Metropolitan Area Network is a computer network that spans a city or a large campus. It covers a larger geographical area than a Local Area Network (LAN) but smaller than a Wide Area Network (WAN). A Personal Area Network (PAN) is the smallest type of network, typically connecting devices within a person's workspace. Therefore, the largest computer network in the given set is the Metropolitan Area Network.

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• 22.

### U mrezne uredjaje koji ne analiziraju odredisnu adresu pre prosledjivanja okvira spadaju:

• A.

Pojacivac signala(ripiter)

• B.

Mrezni most(bridz)

• C.

Razvodnik signala (hab)

• D.

Mrezni komutator(svič)

A. Pojacivac signala(ripiter)
C. Razvodnik signala (hab)
Explanation
The correct answer is Pojacivac signala(ripiter), Razvodnik signala (hab). Both a signal amplifier (repeater) and a signal distributor (hub) do not analyze the destination address before forwarding frames. A signal amplifier simply boosts the signal strength and forwards it to all connected devices, while a signal distributor broadcasts the signal to all connected devices without analyzing the destination address.

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• 23.

### Tehnologija koja ne omogucava emisiono slanje(engl. broadcast) je:

• A.

IEEE 802.11

• B.

Eternet

• C.

Frejm-relej

C. Frejm-relej
Explanation
The correct answer is Frejm-relej. Frame relay is a technology that does not support broadcast transmission. Unlike Ethernet and IEEE 802.11, which both allow for broadcast communication, frame relay is a packet-switching technology that operates on a virtual circuit basis. It does not have the capability to send a message to all devices on the network simultaneously. Therefore, frame relay does not support broadcast transmission.

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• 24.

### Mrezni most (bridz) funkcionise na:

• A.

Fizickom sloju

• B.

Sloju veze

• C.

Mreznom sloju

B. Sloju veze
Explanation
The correct answer is "Sloju veze" which translates to "Link layer" in English. The link layer is responsible for the physical transmission of data over the network. It handles tasks such as framing, error detection and correction, and media access control. This layer ensures that data packets are transmitted reliably between nodes on the same network segment.

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• 25.

### U kljucne komponente komunikacionih protokola spadaju:

• A.

Topologija mreza

• B.

Sintaksa

• C.

CSMA/CD

• D.

• E.

Hardverska podrska

• F.

Semantika

B. Sintaksa
F. Semantika
Explanation
The correct answer includes three key components of communication protocols: syntax, timing synchronization, and semantics. Syntax refers to the rules and structure of how data is formatted and interpreted. Timing synchronization ensures that devices involved in communication are properly synchronized to transmit and receive data at the right time. Semantics refers to the meaning and interpretation of the data being communicated. These three components are essential for effective and accurate communication between devices in a network.

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• 26.

### Najmanju racunarsku mrezu u navedenom skupu cini:

• A.

• B.

Regionalna Racunarska mreza(WAN)

• C.

Globalna racunarska mreza(Internet)

Explanation
The smallest computer network in the given set is the Gradska racunarska mreza (MAN). This type of network covers a specific geographical area, such as a city or a campus. It is smaller in scale compared to a Regionalna Racunarska mreza (WAN), which covers a larger region like a country or a continent, and the Globalna racunarska mreza (Internet), which is a worldwide network connecting millions of devices. Therefore, the MAN network is the smallest among the options provided.

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• 27.

### Najpopularnija zicana tehnologija za lokalne racunarske mreze je:

• A.

USB

• B.

IEEE 802.11

• C.

Token-ring

• D.

Eternet

D. Eternet
Explanation
The correct answer is Ethernet. Ethernet is the most popular wired technology used for local computer networks. It is a system for connecting multiple devices, such as computers, printers, and servers, within a local area network (LAN). Ethernet uses a set of protocols to transmit data packets between devices over a network cable. It provides a reliable and fast connection, making it widely used in both home and business networks. USB, IEEE 802.11, and Token-ring are also network technologies, but they are not as widely used as Ethernet for local computer networks.

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• 28.

### Pravila koja vaze za telekomunikacionu sobu u sistemu strukturnog kabliranja su:

• A.

Telekomunikacionu sobu treba postaviti sto blize instalacijama za lift

• B.

U telekomunikacionu sobu ne treba stavljati opremu za el mrezu

• C.

Jedna telekomunikaciona soba ne bi trebalo da pokvriva vise od 1.000m2

• D.

Telekomunikaciona soba treba da objedini elektricnu, telefonsku I racunarsku mrezu

• E.

Telekomunikaciona soba treba da se nalazi sto blize centru sprata

• F.

Telekomunikaciona soba treba da se nalazi sto blize rubu zgrade

B. U telekomunikacionu sobu ne treba stavljati opremu za el mrezu
C. Jedna telekomunikaciona soba ne bi trebalo da pokvriva vise od 1.000m2
E. Telekomunikaciona soba treba da se nalazi sto blize centru sprata
Explanation
The correct answer is a combination of three statements. First, it states that electrical equipment should not be placed in the telecommunication room. This is because electrical equipment can interfere with the functioning of the telecommunication equipment. Second, it mentions that one telecommunication room should not cover an area larger than 1,000m2. This is to ensure that the telecommunication signals can be efficiently distributed within the designated area. Lastly, it states that the telecommunication room should be located as close as possible to the center of the floor. This positioning allows for better connectivity and distribution of telecommunication services throughout the building.

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• 29.

### U pasivnu mreznu opremu spadaju

• A.

Mrezni mostovi

• B.

Modemi

• C.

Konektori

• D.

Razvodnici

• E.

Krajnji uredjaji

• F.

Komutatori

• G.

Uticnice

• H.

Ruteri

• I.

Kablovi

C. Konektori
G. Uticnice
I. Kablovi
Explanation
Passive network equipment refers to devices that do not require power to function and are used to connect and distribute network signals. Connectors, outlets, and cables are examples of passive network equipment. These components are used to establish physical connections between devices and enable the transmission of data across a network.

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• 30.

### Logicka topologija prve verzije Eterneta je:

• A.

Magistrala

• B.

Prsten

• C.

Zvezda

A. Magistrala
Explanation
The correct answer is "Magistrala". In the first version of Ethernet, the logical topology used was a bus or linear bus topology, also known as "Magistrala". In this topology, all devices are connected to a single cable, forming a linear structure. Data is transmitted in both directions on the cable, and each device on the network listens for data intended for it. This topology allows for easy addition or removal of devices, but a single break in the cable can disrupt the entire network.

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• 31.

### U osnovne tehnike za otkrivanje gresaka nastalih tokom prenosa podataka spadaju:

• A.

Polinomijalna provera

• B.

Kompresija u cilju iznudjivanja priznanja

• C.

Provera parnosti

• D.

Longitudinalna redundantna provera

• E.

Uporedjivanje primljenih sa poslatim bitovima

A. Polinomijalna provera
C. Provera parnosti
D. Longitudinalna redundantna provera
Explanation
The correct answer includes three techniques for error detection during data transmission: polynomial check, parity check, and longitudinal redundant check. Polynomial check involves using a polynomial equation to detect errors in the data. Parity check involves adding an extra bit to the data to ensure that the number of ones is always even or odd. Longitudinal redundant check involves adding additional bits to the data to detect errors in each transmission unit. These techniques help ensure the accuracy and integrity of the transmitted data.

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• 32.

### U sistemu strukturnog kabliranja definisano je da za prenos govora I podataka treba koristiti sledece ili vise kategorija vise kategorije kablova

• A.

Govor – kategorija 5e, podaci – kategorija 5e

• B.

Govor – kategorija 3, podaci – kategorija 3

• C.

Govor – kategorija 3, podaci kategorija 5e

• D.

Govor – kategorija 5e, podaci kategorija 3

C. Govor – kategorija 3, podaci kategorija 5e
Explanation
The correct answer is "Govor – kategorija 3, podaci kategorija 5e". This is because for the transmission of voice, category 3 cables are sufficient, while for data transmission, category 5e cables are required. Therefore, using category 3 cables for voice and category 5e cables for data would meet the requirements for both types of transmission.

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• 33.

### Pri koriscenju FTP kablova dobija se imunitet od EM do:

• A.

88MHz

• B.

30MHz

• C.

6.000MHz

• D.

108MHz

• E.

100MHz

C. 6.000MHz
Explanation
FTP cables provide immunity from electromagnetic interference (EMI) up to a frequency of 6.000MHz. This means that the cables are designed to protect against any interference or noise in the electromagnetic spectrum up to this frequency. It is important to use FTP cables in environments where there is a high likelihood of EMI, such as in industrial settings or areas with a lot of electronic equipment. Using FTP cables helps ensure a reliable and stable connection by minimizing the impact of EMI on the transmission of data.

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• 34.

### CRC-32 kod u Eternet okviru koristi se za:

• A.

Odredjivanje virtualne lokalne mreze kojoj okvir pripada

• B.

• C.

Otkrivanje gresaka pri prenosu

• D.

Kompresovanje podataka

C. Otkrivanje gresaka pri prenosu
Explanation
The CRC-32 code in an Ethernet frame is used to detect errors during transmission.

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• 35.

### Konektori kod RS-232 standarda mogu imati

• A.

1 pin

• B.

8 pinova

• C.

20 pinova

• D.

25 pinova

• E.

9 pinova

D. 25 pinova
E. 9 pinova
Explanation
The RS-232 standard connectors can have either 25 pins or 9 pins. These pins are used for transmitting and receiving data between devices. The 25-pin connector is commonly used for older devices, while the 9-pin connector is more commonly used for modern devices.

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• 36.

### Kljucni elementi u komunikacionom sistemu koji koristi opticke kablove su:

• A.

Predajnik –ultra –zvucni izvor

• B.

Sistem prenosa – upredeni par optickih vlakana

• C.

Sistem prenosa – opticko vlakno

• D.

Prijemnik – ultra –zvucni senzor

• E.

Prijemnik – fotosenzor

• F.

Predajnik – laserska dioda

C. Sistem prenosa – opticko vlakno
E. Prijemnik – fotosenzor
F. Predajnik – laserska dioda
Explanation
The correct answer is a combination of three elements in a communication system that uses optical cables. The transmission system uses optical fibers to transmit signals, the receiver uses a photosensor to detect the signals, and the transmitter uses a laser diode to generate the signals. These elements work together to ensure efficient and accurate communication through the optical cables.

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• 37.

### Komunikacioni protokol cini skup pravila za:

• A.

Signalizaciju

• B.

Realizaciju telekomunikacionog hardvera

• C.

Proveru autenticnosti

• D.

Dizajniranje racunarskih mreza

• E.

Modelovanje problema iz prakse

• F.

Kontrolu gresaka

• G.

Predstavljanje podataka

A. Signalizaciju
C. Proveru autenticnosti
F. Kontrolu gresaka
G. Predstavljanje podataka
Explanation
The communication protocol consists of a set of rules for signaling, authenticating, error control, and data representation. It defines how devices should communicate with each other, ensuring that the information is transmitted accurately, securely, and efficiently. Signalization involves the exchange of control information between devices to establish, maintain, and terminate a communication session. Authentication verification ensures that the communicating parties are who they claim to be. Error control ensures the integrity of data transmission by detecting and correcting errors. Data representation defines the format and structure of the data being transmitted.

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• 38.

### Mrezni most(bridz) podrazumevano poseduje

• A.

2 uticnice

• B.

Vise od 2 uticnice

• C.

1 uticnicu

A. 2 uticnice
Explanation
The correct answer is 2 uticnice. This means that a network bridge by default has two sockets or ports. These sockets allow the bridge to connect multiple devices together and enable communication between them. Having more than two sockets would provide the ability to connect even more devices, while having only one socket would limit the number of devices that can be connected. Therefore, the default configuration of a network bridge includes two sockets.

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• 39.

### Mrezni most (bridz) dozvoljava prolazak okvira u cijem je zaglavlju kao odredisna adresa navedena adresa ciji su svi bitovi jedinice (emisiona adresa, engl.broadcast)

• A.

Zavisi od ptorokola na mreznom nivou

• B.

Netacno

• C.

Tacno

C. Tacno
Explanation
This statement is true. A network bridge allows the passage of frames with a destination address that has all its bits set to one, which is known as a broadcast address. This means that the bridge will forward the frame to all devices on the network. The correctness of this statement depends on the network protocol being used. Different protocols may have different rules for handling broadcast addresses.

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• 40.

### Tehnika poznata pod nazivom CSMA/CD(Carner sense multiple access with collision detection) predstavlja realizaciju

• A.

Multipleksovanja kanala

• B.

• C.

Kontrolisanog pristupa

Explanation
The correct answer is "Pristup na osnovu sadrzaja." The explanation for this answer is that CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is a technique used in Ethernet networks to control access to the network medium. It allows multiple devices to share the same communication channel by sensing whether the channel is currently in use before transmitting data. If a collision is detected, the devices involved in the collision wait for a random amount of time before reattempting transmission. Therefore, CSMA/CD provides access to the network based on the content of the channel and ensures controlled access to avoid collisions.

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• 41.

### Organizacija za upravljanje adresama na Internetu, odredjivanje autonomnih sistema I administraciju korenih servera sistema domenskih imena su:

• A.

• B.

Free Software Foundation, FSF

• C.

European Telecommunications Standards Insitute, ETSI

• D.

Internet Corporation for Assigned Names and Numbers, ICANN

• E.

Internet ASSigned Numbers Authority, IANA

• F.

International Telecommunication Union, ITU

D. Internet Corporation for Assigned Names and Numbers, ICANN
E. Internet ASSigned Numbers Authority, IANA
Explanation
ICANN and IANA are responsible for managing addresses on the internet, determining autonomous systems, and administering the root servers of the domain name system. ICANN is the organization that oversees the assignment of domain names and IP addresses, while IANA is responsible for managing the global coordination of the DNS root, IP addressing, and other internet protocol resources. Together, they play a crucial role in ensuring the smooth functioning and stability of the internet.

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• 42.

### Tokom prenosa 10 paketa podataka pojedinacna velicina od po 100 bitova na prijemnoj strani je utvrdjena greskoa u vidu 8 izmenjenih bitova(u 8 razlicitih paketa je utvrdjena greska na po jednom bitu). U pitanju je sledeci nivo greske:

• A.

1/8

• B.

8/10

• C.

8/1.000

• D.

1/10

• E.

8/100

C. 8/1.000
Explanation
The correct answer is 8/1.000. This means that out of a total of 1,000 bits transmitted, 8 bits were found to be in error. This indicates a relatively high level of error, as 8 out of 1,000 bits is a higher error rate compared to the other options provided.

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• 43.

### Primena kodova za otkrivanje I ispravljanje gresaka tokom prenosa znacajnija je na

• A.

Sistemima za polunomijalnom redudantnom proverom

• B.

Sistemima koji koriste opticka vlakna

• C.

Bezicnim sistemima za prenos podataka

• D.

Zicanim sistemima za prenos podataka

C. Bezicnim sistemima za prenos podataka
Explanation
The use of error detection and correction codes is more significant in wireless data transmission systems. This is because wireless communication is more prone to errors due to factors such as interference, noise, and signal attenuation. Error detection and correction codes help in identifying and correcting these errors, ensuring the integrity and accuracy of the transmitted data. In wired systems, although errors can still occur, they are generally less frequent and can be easily detected and corrected using other techniques. Therefore, the use of error detection and correction codes is not as crucial in wired systems compared to wireless systems.

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• 44.

### Jedan segment putanje kod prenosa podataka sa komutacijom veza istovremeno se moze koristiti za vise paralelnih komunikacija

• A.

Komutacija veza na to nema uticaja

• B.

Tacno

• C.

Netacno

C. Netacno
Explanation
The statement in the question states that one segment of the path in data transmission with circuit switching can be used for multiple parallel communications. However, the correct answer states that this is false, meaning that the switching of connections does have an impact on this.

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• 45.

### Pojacivac signala (ripiter )funkcionise na:

• A.

Fizickom sloju

• B.

Sloju veze

• C.

Mreznom sloju

A. Fizickom sloju
Explanation
The correct answer is "Fizickom sloju" which translates to "Physical layer" in English. The physical layer is responsible for the transmission and reception of raw data between devices. It deals with the physical characteristics of the communication medium such as electrical voltage, signal strength, and physical connectors. A signal amplifier or repeater operates at the physical layer as it amplifies weak signals to ensure they can travel longer distances without losing their integrity.

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• 46.

### Promena analognih signala(kao uzrok gresaka pri prenosu podataka naziva se):

• A.

Harmonijsko izoblicenje

• B.

Eho

• C.

Beli Gausov sum

• D.

Dziter

D. Dziter
Explanation
Dziter je naziv za greške koje se javljaju pri prenosu analognih signala. To su slučajne fluktuacije u amplitudi ili frekvenciji signala, koje mogu biti uzrokovane različitim faktorima kao što su elektromagnetna smetnja ili loša kvaliteta prenosnog kanala. Dziter može dovesti do iskrivljenja ili gubitka podataka prilikom prenosa, što ga čini jednim od glavnih uzroka grešaka pri prenosu podataka.

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• 47.

### Putanje koje su u ruter unete od strane protokola za rutiranje nazivaju se:

• A.

Fiksne putanje

• B.

Logicke putanje

• C.

Staticke putanje

• D.

Permanentne putanje

• E.

Dinamicke putanje

E. Dinamicke putanje
Explanation
The correct answer is "Dinamicke putanje". This refers to the paths that are entered into the router by routing protocols. These dynamic routes are constantly updated and adjusted based on the current network conditions and the routing protocols used. They allow routers to dynamically determine the best path for forwarding data packets based on factors such as network congestion, link failures, and shortest path algorithms. Unlike static routes, which are manually configured and do not change unless modified by an administrator, dynamic routes are automatically learned and updated by the router.

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• 48.

### Oznaka RS-232 odnosi se na:

• A.

Tip konektora za kablove sa upredenim paricama

• B.

Paralelni prenos digitalnih podataka

• C.

Skup standarda za serijsku digitalnu komunikaciju

C. Skup standarda za serijsku digitalnu komunikaciju
Explanation
The RS-232 designation refers to a set of standards for serial digital communication. RS-232 specifies the electrical and mechanical characteristics of the interface between data terminal equipment and data communication equipment. It defines the voltage levels, signal timing, and physical connectors used for serial communication between devices. RS-232 is commonly used for connecting computers and peripherals, such as modems, printers, and mice.

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• 49.

### Sistem horizontalnog kabliranja treba da ima topologiju :

• A.

Zvezde

• B.

Magistrale

• C.

Prstena

A. Zvezde
Explanation
The correct answer is "Zvezde" (Stars). In a horizontal cabling system, the star topology is preferred. This topology connects all network devices to a central point, typically a network switch. Each device has its own dedicated connection to the central point, which allows for easy troubleshooting and scalability. Additionally, if one device fails, it does not affect the rest of the network. This makes the star topology reliable and flexible for horizontal cabling systems.

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• 50.

### Najvecu racunarsku mrezu u navedenom skupu cini

• A.

Globalna racunarska mreza(Internet)

• B.

Regionlana racunarska mreza(Wide Area Network, WAN)

• C.

Gradska Racunarska mreza(Metropolitan Area Network, MAN)