A _______is defined as a small, fixed-size block of information.
A)
frame
B)
packet
C)
cell
D)
none of the above

1 Answer

Answer :

cell

Related questions

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 : Inthe _________ method, a special packet called a ______ circulates through the ring. A) reservation: control frame B) polling: poll request C) token passing: token D) none of the above

Last Answer : token passing: token

Description : A _________ network is across between a circuit-switchednetworkand a datagram network. It has some characteristics ofboth. A) virtual-circuit B) packet-switched C) frame-switched D) none of the above

Last Answer : virtual-circui

Description : In _________, thereis no resource allocation for a packet. A) datagram switching B) circuit switching C) frame switching D) none of the above

Last Answer : datagram switching

Description : An IGMP packet is carried in an __________ packet. A) UDP B) IP C) Ethernet frame D) noneof the above

Last Answer : IP

Description : Which of the following statements is TRUE? a. Both Ethernet frame and IP packet include checksum fields b. Ethernet frame includes a checksum field and IP packet includes a CRC field c. Ethernet ... and IP packet includes a checksum field d. Both Ethernet frame and IP packet include CRC fields

Last Answer : Ethernet frame includes a CRC field and IP packet includes a checksum field

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 : Which of the following term describes PDU encapsulated at Transport Layer? a. Frame b. Packet c. Data d. Segment

Last Answer : d. Segment

Description : A network is a cross between a circuit-switched network and a datagram network. It has some characteristics of both. a. virtual-circuit b. packet-switched c. None of the Given d. frame-switched

Last Answer : a. virtual-circuit

Description : The purpose of the _______is to provide flow and error control for the upper-layer protocols that actually demand theseservices A) MAC B) LLC C) LLU D) none of the above

Last Answer : LLC

Description : _______is the rateof change with respect totime. A) Amplitude B) Time C) Frequency D) Voltage

Last Answer : Time

Description : A _______is the optical link connecting two neighbor devices. A) section B) line C) path D) none of the above

Last Answer : line

Description : In ATM,_______is for short packets. A) AAL1 B) AAL2 C) AAL3/4 D) AAL5

Last Answer : AAL2

Description : A _______is an ARP thatacts on behalf of a set of hosts. A) ARP B) RARP C) proxy ARP D) noneof the above

Last Answer : proxy ARP

Description : A _______is a data communicationsystem withina building, plant,or campus, orbetween nearby buildings. A) MAN B) LAN C) WAN D) none of the above

Last Answer : LAN

Description : A packet filtering firewall can a. deny certain users from accessing a service b. block worms and viruses from entering the network c. disallow some files from being accessed through FTP d. block some hosts from accessing the network

Last Answer : d. block some hosts from accessing the network

Description : An IP datagram of size 1000 bytes arrives at a router. The router has to forward this packet on a link whose MTU (maximum transmission unit) is 100 bytes. Assume that the size of the IP header is 20 bytes ... the IP datagram will be divided into for transmission is : a. 10 b. 50 c. 12 d. 13

Last Answer : d. 13

Description : A __________ is a device that forwards packets between networks by processing the routing information included in the packet. a) bridge b) firewall c) router d) hub

Last Answer : c) router

Description : A wooden block fixed on back side of a door frame on its post, is known as (A) Cleat (B) Stop (C) Horn (D) None of these

Last Answer : Answer: Option B

Description : ______ eliminates the varying delay times associated withdifferent-size packets. A) X.25 B) Frame Relay C) ATM D) all of theabove

Last Answer : ATM

Description : Which of the following technique isused for encapsulation? A. a technique used inbest-effort delivery systems toavoid endlessly loopingpackets. B. a technique used by protocols in which a lower level ... network that cannothandle the originaldatagram size D. All of theabove E. None of the above

Last Answer : a technique used by protocols in which a lower level protocol accepts a message from ahigher level protocol and places it in the data portion of the low level frame

Description : Which of the following technique isused for fragment? A. a technique used inbest-effort delivery systems toavoid endlessly loopingpackets B. a technique used by protocols in which a lower level protocol ... network that cannothandle the originaldatagram size D. All of theabove E. None of the above

Last Answer : one of the pieces that results when an IP gateway divides an IP datagram into smallerpieces for transmission acrossa network that cannothandle the originaldatagram size

Description : the maximum window size for data transmission using the selective reject protocol with n-bit frame sequence numbers is: a. 2^n b. 2^(n-1) c. 2^n – 1 d. 2^(n-2)

Last Answer : b. 2^(n-1)

Description : Suppose that the one-way propagation delay for a 100 Mbps Ethernet having 48-bit jamming signal is 1.04 micro-seconds. The minimum frame size in bits is: a. 112 b. 160 c. 208 d. 256

Last Answer : d. 256

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 : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500

Last Answer : a. 2500

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 : Suppose the round trip propagation delay for a 10 Mbps Ethernet having 48-bit jamming signal is 46.4 ms. The minimum frame size is a. 94 b. 416 c. 464

Last Answer : c. 464

Description : In the Ethernet frame, the_______field contains error detection information. A) CRC B) preamble C) address D) none of the above

Last Answer : CRC

Description : ______ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T. A) X.25 B) Frame Relay C) ATM D) none of the above

Last Answer : ATM

Description : What is used to see if a client is still connected to a NetWare server? A. Spoofing TCP/SAP B. Watchdog packet C. GNS Round Robin D. DNS Round Robin

Last Answer : Watchdog packet

Description : A local telephone network isan example of a_______ network. A) packet-switched B) circuit-switched C) message-switched D) none of the above

Last Answer : circuit-switched

Description : The _______ address in theheader ofa packet in adatagram network normally remains thesame during the entire journeyof the packet. A) source B) destination C) local D) none of the above

Last Answer : destination

Description : We cansay thata packet switchhas _______ typesof components. A) two B) three C) four D) none of the above

Last Answer : four

Description : Packet-switched networks can alsobe divided into ______subcategories: virtual-circuit networks and datagram networks A) four B) three C) two D) five

Last Answer : two

Description : The ATM data packet is acell composed of ______bytes. A) 40 B) 50 C) 52 D) 53

Last Answer : 53

Description : Which of the following is anecessary part of the IPv6 datagram? A) Base header B) Extension header C) Data packet from the upper layer D) (a) and (c)

Last Answer : Base header

Description : The IP packet that carries an IGMP packet has a value of _______ in its protocol field. A) 3 B) 2 C) 1 D) noneof the above

Last Answer : 2

Description : If the sender is a host and wants tosend a packet toanotherhost on another network, the logical address that must be mapped to a physical address is ______. A) thedestination IP address in the datagram ... the IP address of therouter found inthe routing table C) either a or b D) noneof the above

Last Answer : the IP address of therouter found inthe routing table

Description : f the sender is a host and wants tosend a packet toanotherhost on the samenetwork, the logical address that must be mapped to a physical address is ______. A) thedestination IP address in the datagram ... the IP address of therouter found inthe routing table C) either a or b D) noneof the above

Last Answer : hedestination IP address in the datagram header

Description : RPB guarantees that eachdestinationreceives _________ of the packet. A) one copy B) no copies C) multiplecopies D) none of the above

Last Answer : one copy

Description : RPF guarantees that eachnetwork receives only ____ of the multicast packet. A) one copy B) two copies C) a or b D) none of the above

Last Answer : none of the above

Description : In _______, the router may forwardthereceived packet through several of its interfaces. A) unicasting B) multicasting C) broadcasting D) none of the above

Last Answer : multicasting

Description : In ______, the router forwards thereceived packet through only one of its interfaces. A) unicasting B) multicasting C) broadcasting D) none of the above

Last Answer : unicasting

Description : The taskof moving the packet from theinput queue to the output queuein a router is done by_________. A) input and output ports B) routing processor C) switching fabrics D) none of the above

Last Answer : switching fabrics

Description : In _______delivery, the deliverer of theIP packet and the destination are on different networks. A) aconnection-oriented B) a direct C) an indirect D) none of the above

Last Answer : an indirect

Description : In _______delivery, both thedeliverer of the IP packet and the destination are on the same network. A) aconnectionless B) a direct C) an indirect D) none of the above

Last Answer : a direct