Racunarske Mreze 12. Test

The correct answer is "Magistrale" because the question states that the image represents a physical topology, and "Magistrale" is a type of physical topology that consists of a main backbone or highway connecting multiple devices in a linear manner. This type of topology is commonly used in bus networks where all devices are connected to a single communication line.

The correct answer is "Prstena" because the image shows a physical topology where the nodes are connected in a ring or circular fashion. In a ring topology, each node is connected to exactly two other nodes, creating a closed loop. This type of topology is commonly used in local area networks (LANs) and allows for efficient data transmission as each node has equal access to the network.

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The correct answer is 100% kanal na raspolaganju. This means that when the token passes, each station has the entire channel available to send data without any interference or sharing with other stations.

In wireless networks, the MACA (Multiple Access with Collision Avoidance) protocol is used to establish a connection between two stations. The station that initiates the connection needs to send a Request to Send (RTS) signal. This signal is used to reserve the channel and inform other stations that a transmission is about to take place. Once the RTS signal is received by the intended station, it responds with a Clear to Send (CTS) signal, indicating that it is ready to receive the data. Therefore, the correct answer is RTS.

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Terminatori se koriste na krajevima mreza sa topologijom magistrale. U magistralnoj topologiji, svi čvorovi mreže su povezani na istu komunikacionu liniju. Terminatori se koriste na krajevima ove linije kako bi se sprečilo odbijanje signala i smanjila interferencija. Terminatori su električni otpornici koji apsorbuju reflektovane signale i omogućavaju da se signal ravnomerno širi duž magistrale.

In a CSMA (Carrier Sense Multiple Access) network, if two or more stations start sending data simultaneously, a collision occurs. This is because each station listens to the medium before transmitting, and if it senses that the medium is busy, it waits for a random amount of time before attempting to transmit again. However, if multiple stations start transmitting at the same time, they may not detect the ongoing transmissions and collide with each other, resulting in data loss and the need for retransmissions. Therefore, the correct answer is that a collision occurs.

The correct answer is "Bit koji ukazuje da je adresu odredišna stanica prepoznala kao svoju" and "Bit koji ukazuje da je RAM uspešno iskopiran u memoriju odredišne stanice". In the IEEE 802.5 standard, the status field contains bits that provide information about the transmission status. The first bit indicates whether the destination address has been recognized by the receiving station, confirming that it is the intended recipient. The second bit indicates whether the RAM has been successfully copied into the memory of the destination station, ensuring successful transmission.

In the sequential message passing method, the intermediate nodes forward messages to their next neighbor. This means that each intermediate node in the network receives a message and then passes it along to the next node in the sequence. This allows for a step-by-step transmission of messages through the network, ensuring that each node receives and forwards the message in a specific order.

The correct answer is "Se deli na N jednakih delova" which means "It is divided into N equal parts". This suggests that the portable medium with frequency multiplexing is divided into N equal parts, each assigned to a different user. This allows multiple users to share the medium simultaneously without interfering with each other's signals.

The correct answer is "Sa optickim vlaknima" because the letter "F" in "10BaseF" stands for "fiber", indicating that it is a network that uses optical fibers for communication.

The correct answer is "Zvezde" because the question states that the physical topology is shown in the picture. "Zvezde" refers to a star topology, which is a network configuration where all devices are connected to a central hub or switch. This can be inferred from the options given, as "Magistrale" refers to a bus topology, "Prstena" refers to a ring topology, and "Prosirene zvezde" refers to an extended star topology. Therefore, based on the given information, the correct answer is "Zvezde" or star topology.

In the logical topology of one-to-all broadcast, each node decides whether the data packet is intended for it. If it is not, the message is simply ignored.

The correct answer is that the Status field in IEEE 802.5 contains a bit that indicates that the destination station has recognized the address as its own, and a bit that indicates that the frame has been successfully copied into the destination station's memory.

Delimicno dodeljivanje kanala je povezano sa ALOHA sistemima. Ova tehnika se koristi u bežičnim komunikacionim sistemima gde se kanali delimično dodeljuju različitim korisnicima. ALOHA sistem omogućava korisnicima da nezavisno pristupaju kanalu i šalju svoje podatke, ali postoji mogućnost kolizije podataka. Ova tehnika se koristi u sistemima sa vremenskim multipleksom, kodnim multipleksom i frekventnim multipleksom kako bi se efikasno upravljalo deljenim kanalima.

Kolizija na transmisionom medijumu se odnosi na situaciju kada se dva ili više uređaja istovremeno pokušavaju koristiti isti komunikacioni kanal za prenos podataka. Ovo je nepoželjna pojava u mrežnom saobraćaju jer može dovesti do gubitka podataka ili sporijeg prenosa. Kolizija se javlja u mrežama koje koriste metodu pristupa više korisnika (CSMA/CD) i zahteva dodatne mehanizme kako bi se rešila.

The correct answer is "Dedicated Token Ring". In computer networks, the acronym DTR stands for Dedicated Token Ring. This refers to a type of network topology where computers are connected in a ring formation, and a dedicated token is passed around the network to control access to the shared communication medium. This ensures that only one device can transmit data at a time, preventing collisions and ensuring efficient communication.

The given correct answer states that the pring topology with a token is used for local computer networks and metropolitan area networks. This means that this type of topology is suitable for connecting computers and devices within a small geographical area, such as a single building or a city. It allows for efficient communication and data transfer between the connected devices in the local area.

The correct answer is "Multiple Access With Collision Avoidance." MACA is an acronym used in computer networking to describe a protocol that allows multiple devices to access a shared medium without colliding with each other. This protocol uses various techniques to avoid collisions, such as carrier sensing and random backoff timers.

The correct answer is Source Service Access Point. SSAP stands for Source Service Access Point, which is a term used in computer networking to refer to the address of a specific service on a network. It is used to identify the source of a service request and establish communication between different network layers.

In a network with token passing, only the station that receives the "free" token is allowed to transmit data. This means that stations in the network take turns in accessing the transmission medium. When a station receives the token, it has the right to send data until it is finished or until it passes the token to the next station. This method ensures fair access to the medium and prevents collisions between stations trying to transmit simultaneously.

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The correct answer is Ethernet computer networks with a speed of 10Gb/s over twisted pair cables.

The correct answer is "Slanja, sukobljavanja i neaktivni periodi." This is because the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol is used in Ethernet networks to control access to the shared medium. The protocol involves three main periods: the sending period, where a device can transmit data; the collision period, where devices detect collisions and stop transmitting; and the idle period, where the medium is not being used. Therefore, the answer option that includes all three of these periods is the correct one.

Dynamic channel allocation is related to CSMA/CD. CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection, which is a protocol used in Ethernet networks. In CSMA/CD, before transmitting data, a device first checks if the channel is busy (carrier sense). If the channel is clear, the device can send data. However, if multiple devices attempt to transmit at the same time, a collision may occur. CSMA/CD detects collisions and takes appropriate actions to avoid data corruption. Dynamic channel allocation refers to the ability of the protocol to dynamically assign channels to devices based on their availability, ensuring efficient and fair access to the network.

The correct answer is "Ethernet computer networks with a speed of 10Gb/s over twisted pair cables." This is because IEEE 802.3an is a standard that specifically refers to Ethernet networks with a speed of 10Gb/s, and it specifies the use of twisted pair cables for transmission.

The correct answer is "Logicka topologija jedan ka svima" which translates to "Logical topology one to all" in English. This suggests that the image is depicting a logical network topology where there is a single central node that is connected to all other nodes in the network. This type of topology is commonly referred to as a "star topology" in networking.

If a station uses the CSMAA mechanism for data transmission, it first checks whether the transmission medium is busy before sending any data. This is because CSMAA (Carrier Sense Multiple Access with Collision Avoidance) is a protocol that allows multiple stations to share the same transmission medium. By checking if the medium is busy, the station can avoid collisions with other stations that may be transmitting data at the same time. Therefore, the correct answer is "Prvo proverava da li je transmisioni medijum zauzet" (First checks whether the transmission medium is busy).

The correct answer is "Koristi tehniku kodiranja 4D/PAM5." This means that Gigabit Ethernet with UTP Category 5 cables uses the 4D/PAM5 coding technique. 4D/PAM5 is a coding technique that uses four-dimensional pulse amplitude modulation with five levels. This technique is used to encode and decode the signals transmitted over the Ethernet network, ensuring reliable and efficient communication at gigabit speeds.

PoE tehnologija se koristi za obezbeđivanje energetskog napajanja u Ethernet mreži preko upredenih parica. Takođe se koristi za energetsko napajanje IP telefona, pristupnih tačaka i WEB kamera.

The correct answer states that wireless local computer network stations can either send or receive data. This means that these stations have the capability to perform both functions simultaneously. They can send data to other devices on the network or receive data from other devices. This flexibility allows for efficient communication and data transfer within the network.

CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is the correct answer. This protocol is used in Ethernet local area networks on the MAC (Media Access Control) sublayer. It allows multiple devices to share the same communication medium by sensing if it is busy before transmitting data and detecting collisions if they occur. When a collision is detected, the devices involved wait for a random amount of time before retransmitting their data. This protocol helps to ensure that network transmissions are efficient and reliable.

The delay in the FDM system is N times greater than the delay in the CSMA/CD system. This is because in the FDM system, the transmission medium is divided into frequency bands and each station is assigned a specific frequency band, resulting in the need for time-sharing and causing a delay. On the other hand, in the CSMA/CD system, stations can transmit data simultaneously but if a collision occurs, there is a backoff mechanism that introduces a delay. Therefore, the delay in the FDM system is N times greater than the delay in the CSMA/CD system.

The correct answer is "Logicka topologija lokalnih racunarskih mreza" which translates to "Logical topology of local computer networks" in English. This refers to the method or technique used to determine how devices are connected and communicate with each other in a network. It focuses on the logical arrangement of nodes and the flow of data rather than the physical layout of the network.

In Ethernet computer networks, when there is a high traffic intensity, the chances of collision increase. In order to reduce the possibilities of collision, each station increases its delay. This means that when a collision occurs, the stations involved will delay their transmission, allowing for a better chance of successful transmission in the next attempt.

CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is the most efficient mechanism for accessing the transmission medium in local networks with low-intensity traffic. It allows multiple devices to share the same communication channel by sensing whether the channel is busy before transmitting data. If a collision occurs (when two or more devices transmit data simultaneously), CSMA/CD detects it and stops the transmission, then waits for a random amount of time before retransmitting. This mechanism helps to minimize collisions and maximize the efficiency of the network.

The correct answer is 10Gb/s. IEEE 802.3an is a standard for Ethernet local area networks using twisted pair cables. It specifies a data transfer rate of 10 Gigabits per second (10Gb/s).

The correct answer is "Ne dolazi do sudara na transmisionom medijumu" which translates to "There are no collisions on the transmission medium." This means that in the given access mechanism, there is a mechanism in place to prevent collisions from occurring when multiple stations are trying to send data simultaneously. This could be achieved through techniques such as carrier sensing or collision detection.

In a logical topology of one-to-all (broadcast), data is sent simultaneously to all nodes on the network. This means that the data is transmitted to every node on the network at the same time, allowing all nodes to receive the information simultaneously. This type of communication is commonly used in scenarios where information needs to be disseminated to multiple nodes on the network simultaneously, such as broadcasting announcements or updates.

CSMA (Carrier Sense Multiple Access) is the correct answer. CSMA is a method used to access the transmission medium in which a station first checks if another station is already using the medium before transmitting data. If the medium is not busy, the station can proceed with sending the data. This principle helps to avoid collisions and ensures that multiple stations can share the same medium efficiently.

In a sequential logical topology, data is sent from one station to another station in a sequential manner. This means that the data is transmitted from one station to the next station in a specific order, one after the other. Unlike other options mentioned, where data is sent to a central station or to multiple stations simultaneously, in a sequential logical topology, the data is transmitted from one station to another station in a linear fashion.

The correct answer is that the station cannot access the transmission medium until its turn comes. This means that the station has to wait for its turn in order to access and transmit data on the medium.

The given correct answer states that the CSMA/CD method (Carrier Sense Multiple Access with Collision Detection) is widely used in wired local computer networks. This means that in wired LANs, where multiple devices are connected to a common network, CSMA/CD is employed to regulate access to the network and detect collisions that may occur when multiple devices attempt to transmit data simultaneously. This method helps to ensure efficient and reliable communication within wired local computer networks.

IEEE 802.3 is a standard that defines the Ethernet protocol at the MAC (Media Access Control) sublayer. CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is the protocol used by Ethernet to access the shared network medium. It allows devices to listen to the network before transmitting data and if a collision is detected, it aborts the transmission and waits for a random amount of time before reattempting. This protocol is used to manage and prevent collisions on Ethernet networks, ensuring efficient and reliable data transmission.

The answer "Maksimalnom vremenu propagacije (prostiranja) izmedju najudaljenijih stanica" suggests that the time of injury is equal to the maximum time it takes for a signal to propagate between the furthest stations. This means that the injury occurs when the signal has traveled the longest distance and taken the longest time to reach its destination.

The correct answer is CSMA. CSMA stands for Carrier Sense Multiple Access and it is a method used to reduce the possibility of conflicts in accessing a shared transmission medium. With CSMA, devices listen to the medium before transmitting and only send data when the medium is idle. This helps to avoid collisions and ensure efficient communication between multiple devices.

The correct answer is Token Pass because the question is asking about the protocol used on the MAC sublayer according to the IEEE 802.4 standard. Token Pass is a protocol used in token passing networks where a token is passed from one device to another to control access to the network. CSMA/CD is a protocol used in Ethernet networks, CSMA/CA is a protocol used in wireless networks, and Token Ring is a protocol used in token ring networks.

The correct answer is Token Ring. In the IEEE 802.5 standard, the protocol used on the MAC sublayer is Token Ring. Token Ring is a networking protocol that uses a token passing mechanism to control access to the network. It allows devices to transmit data only when they possess the token, ensuring fair access to the network and preventing data collisions.

The correct answer states that the RIF field is used in bridges with source routing. This means that the RIF field is used to specify the complete path that a frame should take through the network, starting from the source. This is in contrast to destination routing, where the path is determined by the network itself based on the destination address.