In ________,a station monitors the medium after it sends a frame to see if the transmission was successful. If so, the station is finished. If, however,
there is a collision, the frameis sentagain.
A)
CSMA/CA
B)
CSMA/CD
C)
either (a)or (b)
D)
both (a) and (b)

1 Answer

Answer :

CSMA/CD

Related questions

Description : __________ augments the CSMA algorithm todetect collision. A) CSMA/CA B) CSMA/CD C) either (a)or (b) D) both (a) and (b

Last Answer : CSMA/CD

Description : In_______, collisions are avoidedthrough theuse of three strategies: the interframe space, the contention window,and acknowledgments. A) CSMA/CA B) CSMA/CD C) either (a)or (b) D) both (a) and (b)

Last Answer : CSMA/CA

Description : Toavoid collisions on wireless networks, ________was invented. A) CSMA/CA B) CSMA/CD C) either (a)or (b) D) both (a) and (b)

Last Answer : CSMA/CA

Description : In _______, collisions are avoided through the use of three strategies: the interframe space, the contention window, and acknowledgments. A. CSMA/CA B. CSMA/CD C. either (a) or (b) D. both (a) and (b)

Last Answer : A. CSMA/CA

Description : ________ requires that each station first listento the medium before sending. A) MA B) CSMA C) FDMA D) CDMA

Last Answer : CSMA

Description : In Ethernet CSMA/CD, the special bit sequence transmitted by media access management to handle collision is called a. Preamble b. Postamble c. Jam d. None of the above

Last Answer : c. Jam

Description : Which of the following is the multiple access protocol for channel access control? a. CSMA/CD b. CSMA/CA c. Both CSMA/CD & CSMA/CA d. HDLC

Last Answer : c. Both CSMA/CD & CSMA/CA

Description : Which of the following is the multiple access protocol for channel access control? A. CSMA/CD B. CSMA/CA C. Both CSMA/CD & CSMA/CA D. HDLC

Last Answer : C. Both CSMA/CD & CSMA/CA

Description : The minimum frame size required for a CSMA/CD based computer network running at 1 Gbps on a 200m cable with a link speed of 2 × 108m/s is a. 125 bytes b. 250 bytes c. 500 bytes d. None of these

Last Answer : b. 250 bytes

Description : Consider a CSMA/CD network that transmits data at a rate of 100 Mbps (108 bits per second) over a 1 km (kilometre) cable with no repeaters. If the minimum frame size required for this network is 1250 bytes, what is the signal speed (km/sec) in the cable? a. 8000 b. 10000 c. 16000 d. 20000

Last Answer : d. 20000

Description : In IEEE 802.11, the access method used in the DCF sublayer is _________. A) ALOHA B) CSMA/CA C) CSMA/CD D) none of the above

Last Answer : CSMA/CA

Description : Explain CSMA/CD and CSMA/CA.

Last Answer : CSMA- resolving the media contention. Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Listen for Data Transmission on Cable (Carrier Sense) When Medium is free a) Transmit ... time, and transmit again. Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) Nov/Dec

Description : The RTS and CTS frames in CSMA/CA ____ solvethe hidden stationproblem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem. A) can; cannot B) cannot; can C) can; can D) cannot; cannot

Last Answer : can; cannot

Description : In ______, the chanceof collisioncan be reduced if a station senses the medium beforetrying touse it. A) MA B) CSMA C) FDMA D) CDMA

Last Answer : CSMA

Description : Inthe _________ method, after the station finds the lineidle, it sends its frame immediately. If the line isnot idle, it continuously senses theline until it finds it idle. A) nonpersistent B) 1-persistent C) p-persistent D) none of the above

Last Answer : 1-persistent

Description : In an Ethernet local area network, which one of the following statements is TRUE ? a. A station stops to sense the channel once it starts transmitting a frame. b. The purpose ... collision is detected. d. The exponential backoff mechanism reduces the probability of collision on retransmissions

Last Answer : The exponential backoff mechanism reduces the probability of collision on retransmissions

Description : What is CSMA/CA?

Last Answer : ∙ CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is a protocol for carrier transmission in 802.11 networks. ∙ CSMA/CA acts to prevent collisions before they happen. ∙ In CSMA/CA, as soon as a node receives a packet that is to be sent, it checks to be sure the channel is clear.

Description : The _____sublayer is responsible for the operation of the CSMA/CD access method and framing. A) LLC B) MII C) MAC D) none of the above

Last Answer : MAC

Description : The IEEE 802.3 Standard defines _________ CSMA/CD as the access method for first-generation 10-Mbps Ethernet. A) 1-persistent B) p-persistent C) non-persistent D) none of the above

Last Answer : 1-persistent

Description : Which of the following statements is TRUE about CSMA/CD a. IEEE 802.11 wireless LAN runs CSMA/CD protocol b. Ethernet is not based on CSMA/CD protocol c. CSMA/CD is not suitable for a high propagation delay network like satellite network d. There is no contention in a CSMA/CD network

Last Answer : CSMA/CD is not suitable for a high propagation delay

Description : What is CSMA/CD?

Last Answer : Carrier Sense Multiple Access with Collision Detection (CSMA/CD) When a station has a frame to transmit: 1) Listen for Data Transmission on Cable (Carrier Sense) 2) When Medium is Quiet (no ... for Collision. b) If collision is heard, stop transmitting, wait random time, and transmit again.

Description : Explain the terms topology and access methods used in LANs. Discuss the CSMA/CD and CSMA/CA protocols.

Last Answer : (i) LAN topologies: Network topology is a physical schematic which shows interconnection of the many users. There are four basic topologies as under:  (a) Direct Connection or one to all ... it is free, the station transmits, and waits for an acknowledgment signal that the packet was received

Description : LAN? a) CDMA b) CSMA/CA c) ALOHA d) CSMA/CD

Last Answer : b) CSMA/CA

Description : When does the station B send a positive acknowledgement (ACK) to station A in Stop and Wait protocol? a. only when no error occurs at the transmission level b. when retransmission of old packet in a novel frame is necessary c. only when station B receives frame with errors d. all of the above

Last Answer : only when no error occurs at the transmission level

Description : When does the station B send a positive acknowledgement (ACK) to station A in Stop and Wait protocol? a. only when no error occurs at the transmission level b. when retransmission of old packet in a novel frame is necessary c. only when station B receives frame with errors d. all of the above

Last Answer : only when no error occurs at the transmission level

Description : Frame Relay provides ________. A) PVCs B) SVCs C) either (a) or (b) D) neither (a) nor (b)

Last Answer : Frame Relay

Description : Transmission system for a multidrop network A. Taken passing B. Polling C. Switching D. CSMA/CD

Last Answer : B. Polling

Description : Inthe ________method, a stationthat has a frame tosend senses the line. If the line is idle, it sends immediately. If theline is not idle, it waits a random amount of time and then senses the line again. A) nonpersistent B) 1-persistent C) p-persistent D) none of the above

Last Answer : nonpersistent

Description : Inthe _____ Protocol, the sender sends one frame, stops until it receives confirmation from the receiver, and then sends the next frame. A) Stop-and-Wait B) Simplest C) Go-Back-N ARQ D) Selective-Repeat ARQ

Last Answer : Stop-and-Wait

Description : Frame Relay networks offer an optioncalled ______________that sends voice through the network. A) VOFR B) FRAD C) MUX D) none of the above

Last Answer : VOFR

Description : An STS-3 frameis madeof ________columns. A) 9 B) 90 C) 270 D) none of the above

Last Answer : none of the above

Description : An STS-3 frameis madeof ______ rows. A) 1 B) 9 C) 27 D) none of the above

Last Answer : 27

Description : An STS-1 frameis made______columns A) 1 B) 9 C) 90 D) none of the above

Last Answer : 90

Description : An STS-1 frameis madeof ________rows A) 1 B) 9 C) 90 D) none of the above

Last Answer : 1

Description : ________ is a typeof transmission impairment in which the signal loses strength due to theresistance of the transmission medium. A) Attenuation B) Distortion C) Noise D) Decibel

Last Answer : Attenuation

Description : . If there is only one station with a packet to send, this guarantees that there will ………….. For that packet. A. never be a collision B. be a collision C. be an improvement D. direction

Last Answer : A. never be a collision

Description : SONET sends ________ frames per second A) 1000 B) 2000 C) 4000 D) 8000

Last Answer : 2000

Description : To create a neighborhood relationship,a router running BGP sends an ________ message. A) open B) update C) keepalive D) none of the above

Last Answer : open

Description : Which of the following condition is usedto transmit two packets overa medium at the same time? A. Contention B. Collision C. Synchronous D. Asynchronous E. None of the above

Last Answer : Collision

Description : User datagram protocol is called connectionless because _____________ a. all UDP packets are treated independently by transport layer b. it sends data as a stream of related packets c. it is received ... order d. it sends data very quickly Answer: Option(a) 4. Transmission control protocol ____

Last Answer : a. all UDP packets are treated independently by transport layer

Description : The loads supported by an automobile frame are……….. a) Weight of the body and Passengers. b) Torque from engine and Transmission. c) Sudden Impact from Collision d) All of the above.

Last Answer : d) All of the above.

Description : The vulnerable timefor CSMA is the ________propagationtime. A) the sameas B) two times C) three times D) none of the above

Last Answer : the sameas

Description : In IEEE 802.11, when a frame isgoingfrom a station to an AP, theaddress flag is _____. A) 00 B) 01 C) 10 D) 11

Last Answer : 10

Description : In IEEE 802.11, when a frame isgoingfrom one station in a BSS toanother without passing through thedistribution system, the address flag is _____ A) 00 B) 01 C) 10 D) 11

Last Answer : 00

Description : Which multiple access technique is used by IEEE 802.11 standard for wireless LAN? a. ALOHA b. CSMA/CA c. CDMA d. none of the mentioned

Last Answer : b. CSMA/CA

Description : A malignant tumor a) gains access to the blood and lymphatic channels. By this mechanism, the tumor metastasizes to other areas of the body. b) demonstrates cells that are well- ... malignant tumor grows at the periphery and sends out processes that infiltrate and destroy surrounding tissues.

Last Answer : a) gains access to the blood and lymphatic channels. By this mechanism, the tumor metastasizes to other areas of the body.

Description : At the data link layer, Frame Relayusesa protocol that supports _____control. A) flow B) error C) either (a) or (b D) neither (a) nor (b)

Last Answer : neither (a) nor (b)

Description : In Frame Relay, when. ______ is selected, it requires establishing andterminatingphases A) a PVC B) an SVC C) either (a) or (b) D) neither (a) nor (b)

Last Answer : an SVC

Description : In Frame Relay, when a _____ is selected, the correspondingtable entry is recorded for all switches by the administrator A) PVC B) SVC C) either (a) or (b) D) neither (a) nor (b)

Last Answer : PVC