Rm - II Odbrana Laboratorijskih Vežbi
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Questions and Answers
- 1.
Šta predstavlja adresa 127.0.0.1?
- A.
Adresu lokalne petlje (loopback)
- B.
Upotrebljivu adresu iz klase B
- C.
Adresu jednog od 13 root DNS servera
- D.
Upotrebljivu adresu iz klase A
Correct Answer
A. Adresu lokalne petlje (loopback)Explanation
The given correct answer is "Adresu lokalne petlje (loopback)". This means that the address 127.0.0.1 represents the loopback address. The loopback address is a special IP address that is used to test network connectivity on a local device. When a packet is sent to the loopback address, it is immediately redirected back to the source device without being sent over the network. This allows the device to test its own network stack and ensure that it is functioning properly. The loopback address is commonly used for troubleshooting network issues and for running local servers or services.Rate this question:
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- 2.
Adresa hosta je 160.10.10.145/28. Kojoj podmreži pripada ovaj host?
- A.
160.10.10.132/28
- B.
160.10.10.0/24
- C.
160.10.10.128/28
- D.
160.10.10.144/28
Correct Answer
D. 160.10.10.144/28Explanation
The given host address is 160.10.10.145/28. The subnet mask /28 indicates that the first 28 bits in the address are the network portion, while the remaining 4 bits are for host addressing. To determine the network address, we need to consider the subnet mask. In this case, the subnet mask is 28, which means the network portion is 28 bits long. So, the network address for this host would be 160.10.10.144/28.Rate this question:
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- 3.
Pomoću koje komande možemo odbaciti dinamički dodeljenu IP adresu?
Correct Answer
ipconfig/releaseExplanation
Komandom "ipconfig/release" možemo odbaciti dinamički dodeljenu IP adresu. Ova komanda se koristi u Windows operativnom sistemu i oslobađa sve IP adrese koje su bile dodeljene putem DHCP (Dynamic Host Configuration Protocol) servera. Odbacivanje IP adrese omogućava računaru da zatraži i dobije novu IP adresu od DHCP servera.Rate this question:
- 4.
Šta predstavlja metrika neke rute?
- A.
Predstavlja udaljenost i brzinu linkova do neke destinacije
- B.
Ocenu kvaliteta rute do neke destinacije
- C.
Metrika je mera udaljenosti računara do podrazumevanog mrežnog prolaza (default gateway)
- D.
Predstavlja isključivo brzinu linkova na ruti do neke destinacije
Correct Answer
B. Ocenu kvaliteta rute do neke destinacijeExplanation
The correct answer is "Ocenu kvaliteta rute do neke destinacije" which means "It represents the quality rating of the route to a destination". This suggests that the metric is used to evaluate the quality or performance of a particular route to reach a destination.Rate this question:
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- 5.
Kada računare povežemo na komutator (switch), oni se više ne nalaze u istom broadcast domenu.
- A.
Tačno
- B.
Netačno
Correct Answer
A. TačnoExplanation
When computers are connected to a switch, they are no longer in the same broadcast domain. This means that broadcast traffic, such as network discovery messages, will not be forwarded to all devices in the network. Instead, the switch will only send the traffic to the specific device it is intended for, improving network efficiency and reducing unnecessary network congestion.Rate this question:
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- 6.
Ime bežične mreže se označava sa:
- A.
ESID
- B.
SSHD
- C.
SSID
- D.
SISD
Correct Answer
C. SSIDExplanation
The correct answer is SSID. SSID stands for Service Set Identifier and it is used to identify a specific wireless network. It is a unique name assigned to a wireless network and allows devices to connect to the correct network.Rate this question:
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- 7.
Kolika je dužina (u bajtovima) IP adrese verzije 4?
Correct Answer
4096Explanation
The given answer, 4096, is incorrect. The length of an IP address version 4 is 32 bits, which is equivalent to 4 bytes or 4 * 8 = 32 bytes. Therefore, the correct answer should be 32, not 4096.Rate this question:
- 8.
Uneli ste u komandnu liniju sledeću komandu: ping 127.0.0.1. Nakon unete komande niste dobili nikakav odziv. Šta je mogući uzrok?
- A.
Adresa mrežnog prolaza (default gateway) nije konfigurisana
- B.
IP protokol nije instaliran na ovom računaru
- C.
Računaru nije dodeljena IP adresa
- D.
DNS server nije dostupan
Correct Answer
B. IP protokol nije instaliran na ovom računaruExplanation
The possible cause for not receiving any response after entering the command "ping 127.0.0.1" is that the IP protocol is not installed on this computer.Rate this question:
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- 9.
DNS sistem imena je hijerarhijski organizovan.
- A.
Tačno
- B.
Netačno
Correct Answer
A. TačnoExplanation
The given statement states that the DNS (Domain Name System) is hierarchically organized. This means that the DNS system is structured in a hierarchical manner, with different levels of authority and control. At the top of the hierarchy are the root servers, followed by top-level domain servers, and then authoritative name servers for specific domains. This hierarchical organization allows for efficient and reliable resolution of domain names to their corresponding IP addresses. Therefore, the answer "Tačno" (True) is correct.Rate this question:
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- 10.
Neophodno je da mrežni adapter na DHCP serveru ima statički konfigurisanu IP adresu.
- A.
Tačno
- B.
Netačno
Correct Answer
A. TačnoExplanation
It is necessary for the network adapter on the DHCP server to have a statically configured IP address. This is because the DHCP server is responsible for assigning IP addresses dynamically to other devices on the network. If the network adapter on the DHCP server had a dynamic IP address, it would not be able to provide consistent and reliable IP address assignments to other devices. Therefore, having a static IP address ensures the stability and functionality of the DHCP server.Rate this question:
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- 11.
Na slici je prikazan proces:
- A.
Dekapsulacije podataka
- B.
Provere tačnosti podataka
- C.
Raspakivanja podataka
- D.
Enkapsulacije podataka
Correct Answer
D. Enkapsulacije podataka -
- 12.
DHCP je:
- A.
Protokol za dinamičko dodeljivanje MAC adresa
- B.
Protokol za dinamičko razrešavanje fizičkih adresa
- C.
Protokol za dinamičko razrešavanje imena
- D.
Protokol za dinamičko konfigurisanje hostova IP adresama
Correct Answer
D. Protokol za dinamičko konfigurisanje hostova IP adresamaExplanation
DHCP (Dynamic Host Configuration Protocol) is a protocol used for dynamically assigning IP addresses to hosts on a network. It allows hosts to automatically obtain IP addresses, subnet masks, default gateways, and other network configuration parameters from a DHCP server. Therefore, the correct answer is "Protokol za dinamičko konfigurisanje hostova IP adresama" which translates to "Protocol for dynamically configuring hosts with IP addresses."Rate this question:
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- 13.
Koju komandu koristimo kada želimo da dobijemo najosnovnije podatke o IP adresi na računaru?
- A.
Ipconfig
- B.
Ipconfig/all
- C.
Netstat
- D.
Ping
Correct Answer
A. IpconfigExplanation
The correct answer is "ipconfig". The ipconfig command is used to obtain basic information about the IP address on a computer. It displays the IP address, subnet mask, and default gateway for all network adapters on the computer. It is a useful command for troubleshooting network connectivity issues and verifying network settings.Rate this question:
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- 14.
Koji od navedenih nisu upiti kod DNS-a? (Pitanje sa više tačnih odgovora)
- A.
Direktni
- B.
Rekurzivni
- C.
Iterativni
- D.
Inverzni
Correct Answer(s)
A. Direktni
C. IterativniExplanation
Direktni i iterativni upiti nisu upiti kod DNS-a. DNS (Domain Name System) je sistem koji prevodi domenska imena u IP adrese. Rekurzivni upiti traže od DNS servera da pruže odgovor na upit, dok iterativni upiti traže od DNS servera da pruže najbolju dostupnu informaciju, ali ne i potpuni odgovor. Direktni upiti nisu uobičajeni termin u kontekstu DNS-a, dok inverzni upiti traže prevod IP adrese u domensko ime.Rate this question:
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- 15.
Beacon okvirima se:
- A.
Oglašava postojanje skupa servisa i parametara
- B.
Proverava jačina signala pristupnih tačaka
- C.
Vrši autentifikacija stanice u skup servisa
- D.
Upravlja članstvom stanice u skupu servisa
Correct Answer
C. Vrši autentifikacija stanice u skup servisaExplanation
The correct answer is "Vrši autentifikacija stanice u skup servisa." This means that the beacon frames perform the authentication of the station in the set of services. The beacon frames are used in wireless networks to advertise the existence of a set of services and parameters, check the signal strength of access points, and manage the station's membership in the set of services. However, the specific function mentioned in the correct answer is the authentication of the station.Rate this question:
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- 16.
Jedinice podataka na četvrtom sloju nazivaju se?
- A.
Ramovi
- B.
Segmenti
- C.
Paketi
- D.
Okviri
Correct Answer
B. SegmentiExplanation
The correct answer is "Segmenti". On the fourth layer of the network, the data units are called segments.Rate this question:
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- 17.
Šta će uraditi DNS server ako dobije zadatak da razreši upit za koji nije autoritativan?
- A.
Odbaciće upit i poslaće obaveštenje korisniku da lokacija nije dostupna
- B.
Poslaće obaveštenje korisniku da lokacija nije dostupna
- C.
Kontaktiraće druge DNS servere
- D.
Odbaciće upit
Correct Answer
C. Kontaktiraće druge DNS servereExplanation
If a DNS server receives a query for which it is not authoritative, it will contact other DNS servers to resolve the query.Rate this question:
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- 18.
Da li dva računara sa navedenim adresama, pri čemu je uzeta podrazumevana maska mreže, mogu međusobno da komuniciraju ako su povezana direktno, bez posredstva rutera? IP adresa 1. računara: 204.219.94.16 IP adresa 1. računara: 204.219.82.231
- A.
Mogu
- B.
Ne mogu
Correct Answer
B. Ne moguExplanation
The two computers cannot communicate directly without a router because they have different network addresses. The first computer has an IP address of 204.219.94.16, while the second computer has an IP address of 204.219.82.231. Since the network portion of the IP addresses is different, they are on different networks and cannot communicate directly. A router is needed to connect the two networks and enable communication between the computers.Rate this question:
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- 19.
Šta predstavlja "www" u "www.google.com"?
- A.
Ništa od ponuđenog
- B.
Ime hosta servera
- C.
Ime domena
- D.
Geografsku lokaciju
Correct Answer
A. Ništa od ponuđenogExplanation
The correct answer is "Ništa od ponuđenog" (None of the above). This is because the question is asking what does "www" represent in "www.google.com", and none of the options provided accurately represent what "www" stands for in this context. "www" is a common subdomain prefix used to indicate that a website is part of the World Wide Web, but it does not specifically represent the hostname, domain name, or geographical location of the server.Rate this question:
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- 20.
U slučaju da je DHCP server instaliran na Windows Server 2008 operativnom sistemu koji nije član domena, neophodno je izvršiti autorizaciju servera izborom opcije Authorize.
- A.
Tačno
- B.
Netačno
Correct Answer
A. TačnoExplanation
The explanation for the correct answer is that if the DHCP server is installed on a Windows Server 2008 operating system that is not a member of a domain, it is necessary to authorize the server by selecting the "Authorize" option. This is because authorization is required for the DHCP server to function properly and provide IP addresses to clients on the network.Rate this question:
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- 21.
Ruter je moguće podesiti da radi kao zaštitna barijera (firewall).
- A.
Tačno
- B.
Netačno
Correct Answer
A. TačnoExplanation
The statement is stating that it is possible to configure a router to function as a firewall. This means that a router can be set up to provide security by filtering and controlling the incoming and outgoing network traffic. It can block unauthorized access and protect the network from potential threats. Therefore, the answer "Tačno" (True) is correct.Rate this question:
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- 22.
Koji adresni opsezi su definisani kao privatni u dokumentu RFC 1918?
- A.
127.0.0.0/8
- B.
192.168.1.0/24
- C.
10.0.0.0/8
- D.
172.16.0.0/12
- E.
10.255.255.255/8
- F.
172.32.0.0/16
- G.
224.0.0.0/24
- H.
192.168.0.0/16
Correct Answer(s)
C. 10.0.0.0/8
D. 172.16.0.0/12
E. 10.255.255.255/8
H. 192.168.0.0/16Explanation
The correct answer includes IP address ranges that are defined as private in RFC 1918. These private address ranges are reserved for use within private networks and are not routable on the public internet. The IP address ranges included in the answer are 10.0.0.0/8, 172.16.0.0/12, 10.255.255.255/8, and 192.168.0.0/16. These ranges are commonly used in home and office networks for internal communication.Rate this question:
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- 23.
Šta će biti rezultat izvršavanja naredbe arp -a iz komandne linije?
- A.
Biće prikazan tzv. arp keš, odnosno parovi IP adresa - MAC adresa koji su već razrešeni
- B.
Biće prikazan keš koji potiče od sistema razrešavanja imena
- C.
Biće započet proces razrešenja fizičke adrese
- D.
Biće obrisan arp keš
Correct Answer
A. Biće prikazan tzv. arp keš, odnosno parovi IP adresa - MAC adresa koji su već razrešeniExplanation
The correct answer is that the command "arp -a" will display the arp cache, which contains the pairs of IP addresses and MAC addresses that have already been resolved.Rate this question:
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- 24.
Kakva se komunikacija može ostvariti ako se radne stanice povežu na komutator (switch)?
- A.
Simplex
- B.
Full - duplex
- C.
Half - duplex
- D.
Ne može se ostvariti komunikacija
Correct Answer
B. Full - duplexExplanation
When workstations are connected to a switch, full-duplex communication can be achieved. Full-duplex communication allows for simultaneous two-way communication, meaning that data can be sent and received at the same time. This is possible because the switch provides separate channels for sending and receiving data, allowing for increased efficiency and faster communication between the workstations.Rate this question:
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- 25.
Na raspolaganju nam je adresa mreže 168.18.0.0. Treba da napravimo 120 podmreža. Koju masku podmreže bi trebalo da upotrebimo?
- A.
255.255.192.0
- B.
255.255.254.0
- C.
255.255.252.0
- D.
255.255.128.0
Correct Answer
D. 255.255.128.0Explanation
To create 120 subnets, we need a subnet mask that can accommodate at least 120 subnets. The subnet mask 255.255.128.0 provides 128 subnets, which is more than the required 120 subnets. Therefore, this subnet mask is suitable for creating 120 subnets.Rate this question:
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- 26.
Koren DNS stabla se označava sa:
- A.
.
- B.
Com
- C.
Org
- D.
Edu
Correct Answer
A. .Explanation
The correct answer is the top-level domain (TLD) indicator, which is denoted by a period (.). TLDs are the last part of a domain name and help categorize websites based on their purpose or geographical location. Some common TLDs include .com (commercial), .org (organization), and .edu (education). The period is used to separate the TLD from the rest of the domain name.Rate this question:
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- 27.
Za svaki LAN je navedeno koliko treba korisnih adresa da se obezbedi podmrežavanjem jedne adrese iz klase A, i to upotrebom VLSM tehnike: LAN1 205, LAN2 400, LAN3 1600, LAN4 50. Prema tome, ne računajući podrazumevanu masku za klasu A, koja je prva maska koju ćemo iskoristiti?
- A.
255.255.128.0
- B.
255.255.252.0
- C.
255.255.0.0
- D.
255.255.248.0
- E.
255.255.254.0
- F.
255.255.255.128
Correct Answer
D. 255.255.248.0Explanation
The correct answer is 255.255.248.0. This is the first subnet mask that can provide enough usable addresses for all the LANs mentioned in the question. The other subnet masks listed do not have enough usable addresses to accommodate the required number of addresses for each LAN.Rate this question:
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- 28.
Koliko je podmreža i adresa za hostove dostupno ako na adresu 193.160.120.0 primenimo masku /27 (napomena: adresa pre ovoga nije podmrežavana)?
- A.
8 podmreža sa 30 adresa za hostove u svakoj
- B.
8 podmreža sa 32 adrese za hostove u svakoj
- C.
6 podmreža sa 32 adrese za hostove u svakoj
- D.
8 podmreža sa 16 adresa za hostove u svakoj
Correct Answer
A. 8 podmreža sa 30 adresa za hostove u svakojExplanation
The given IP address 193.160.120.0 with a subnet mask of /27 allows for the creation of 8 subnets. Each subnet can accommodate 30 host addresses. This is because a /27 subnet mask reserves 5 bits for the network portion and leaves 3 bits for the host portion. With 3 bits, we can have 2^3 = 8 possible combinations, which translates to 8 subnets. Each subnet can have 2^5 - 2 = 30 usable host addresses, as 2 addresses are reserved for network and broadcast addresses. Therefore, the correct answer is 8 subnets with 30 host addresses each.Rate this question:
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- 29.
Koja od navedenih adresa je validna adresa koja se može dodeliti hostu?
- A.
15.180.20.164/27
- B.
165.12.25.16/28
- C.
198.122.1.56/29
- D.
130.16.16.127/26
Correct Answer
A. 15.180.20.164/27Explanation
The given answer, 15.180.20.164/27, is a valid address that can be assigned to a host. The address is in the format of an IP address followed by a subnet mask. The subnet mask /27 indicates that the first 27 bits of the IP address are the network address, leaving 5 bits for host addresses. This means that there are 32 possible host addresses in this subnet. The IP address 15.180.20.164 falls within this range, making it a valid address for a host in this subnet.Rate this question:
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- 30.
Koju masku podmreže moramo da upotrebimo kako bi podmrežavanjem mrežne adrese 89.0.0.0 dobili 400 podmreža?
- A.
/17
- B.
/18
- C.
/16
- D.
/15
Correct Answer
A. /17Explanation
To obtain 400 subnets from the network address 89.0.0.0, we need to use a subnet mask of /17. This subnet mask allows for 32768 subnets, which is more than the required 400 subnets. Therefore, using a /17 subnet mask will provide enough subnets to meet the requirement.Rate this question:
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- 31.
Da li adresu 172.17.32.63/26 možemo dodeliti hostu?
- A.
Da
- B.
Ne
Correct Answer
B. NeExplanation
The given IP address, 172.17.32.63/26, represents a network address with a subnet mask of 26 bits. In a /26 subnet, only 64 IP addresses are available for hosts. However, the given address, 172.17.32.63, is the broadcast address for this subnet and cannot be assigned to a host. Therefore, the correct answer is "Ne" (No).Rate this question:
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