Description : The HFC network uses _______ cable. A) twisted-pair B) coaxial C) fiber-optic D) acombination of (b) and (c)
Last Answer : fiber-optic
Description : Thestandard for datatransmission over an HFC network is called _______. A) MCNS B) DOCSIS C) CMTS D) ADSL
Last Answer : DOCSIS
Description : Inan HFC network, the upstream data are modulated using the _______ modulation technique. A) QAM B) QPSK C) PCM D) ASK
Last Answer : QPSK
Description : Inan HFC network, the downstream data are modulated using the _______ modulation technique. A) PSK B) QAM C) PCM D) ASK
Last Answer : QAM
Description : A network router joins two _________ together? A. Computers B. Switches C. Networks D. Gateway
Last Answer : C. Networks
Description : Touse a cable network for data transmission, we needtwo keydevices:a ______ and a _________ A) CM; CMS B) CT; CMTS C) CM; CMTS D) none of the above
Last Answer : CM; CMS
Description : In computer networks _________ is a characteristic that a flow needs where Lack of it means losing a packet or acknowledgment, which entails retransmission. A. Reliability B. Delay C. Jitter D. Bandwidth
Last Answer : A. Reliability
Description : In ------ topology cable is broken, networks get down. a. Star b. Mesh c. Bus d. Ring
Last Answer : c. Bus
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 : You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and192.168.7.0. What subnet mask can you use to combine these addresses intoone? A. 255.255.252.0 B. 225.255.254.0 C. 255.255.255.240 D. 255.255.255.252
Last Answer : 255.255.252.0
Description : Which of the following statements is correct for the use of packet switching? A. the subdivision of information into individuallyaddressed packets in conjunction with alternativerouting arrangementenabled the transmission path ... capacity could be achieved. D. All of theabove E. None of the above
Last Answer : All of theabove
Description : Which of the following statement is true? I. An address with all bits 1 is interpreted as all networks or all hosts. II. The class A network 128.0.0.0 is defined as the loopback network. a. i only b. ii only c. Both A and B d. None of the above
Last Answer : a. i only
Description : What is one advantage of setting up a DMZ(Demilitarized Zone) with two firewalls? a. You can control where traffic goes in the three networks b. You can do stateful packet filtering c. You can do load balancing d. Improve network performance
Last Answer : a. You can control where traffic goes in the three networks
Description : The ability of a single network to span multiple physical networks is known as ______ a. Subnetting b. Masking c. Fragmenting d. Hopping
Last Answer : a. Subnetting
Description : The purpose of a proxy server is to control exchange of data between the two networks at …………..instead of ……….. A. an application level , an IP level B. network layer, physical layer C. an application layer, physical layer D. Network layer , an application layer
Last Answer : A. an application level , an IP level
Description : . In addresses for _______ networks, the first 16 bits specify a particular network, and the last 16 bits specify a particular host. A. class A B. class C C. class B D. class D
Last Answer : C. class B
Description : The secondgeneration of Human rights corresponds to (a) Civil and Political Rights (b) Economic, Social and Cultural rights (c) Environmental Rights (d) Development Rights
Last Answer : (b) Economic, Social and Cultural rights
Description : _________ uses thin coaxial cable. A) 10Base5 B) 10Base2 C) 10Base-T D) 10Base-F
Last Answer : 10Base2
Description : _________ is a computational model based on the structure of biological neural networks? (A) Artificial Neural Network (ANN) (B) Biological Network (C) Both(A) & (B) (D) None of the Above
Last Answer : (A) Artificial Neural Network (ANN)
Description : In hindsight, do you think it was a mistake for the Conan O'Brien Show to move from the big 3 networks to a smaller cable network?
Last Answer : No. Because I hated that show. They should do the same to David Letterman, and cut the Tonight Show with Jay Leno to 30 min seeing the people I know only listen to the monologue and the first skit and rarely special guests and never the music at the end.
Description : In Bluetooth, multiple ________ form a network called a _________. A) scatternet; piconets B) piconets: scatternet C) piconets:bluenet D) bluenet; scatternet
Last Answer : piconets: scatternet
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 : A ring SONET network can be _________. A) unidirectional B) bidirectional. C) either (a) or (b) D) neither (a) nor (b)
Last Answer : bidirectional.
Description : ICMP is a _________ layer protocol. A) datalink B) transport C) network D) noneof the above
Last Answer : network
Description : Congestion control can control traffic entry into a telecommunications network, so to avoid _________ a. Congestive connection b. Connection collapse c. Congestive collapse d. Collapse congestive
Last Answer : c. Congestive collapse
Description : Network layer protocol exits in _________ a. Host b. Switches c. Packets d. Bridges
Last Answer : a. Host
Description : The data link layer takes the packets from _________ and encapsulates them into frames for transmission. a) network layer b) physical layer c) transport layer d) application layer
Last Answer : a) network layer
Description : We addr redundant bits toeach block to make thelength n = k + r. The resultingn-bit blocksare called _________. A) datawords B) blockwords C) codewords D) none of the above
Last Answer : codewords
Description : We add r redundant bits to each block to make the length n = k + r. The resulting n-bit blocks are called _________ A. datawords B. blockwords C. codewords D. none of the above
Last Answer : C. codewords
Description : A traditional cable TV network transmits signals ______. A) upstream B) downstream C) upstream and downstream D) none of the above
Last Answer : downstream
Description : was the first step in the evolution of Ethernet from a coaxial cable bus to hub managed, twisted pair network. a. Star LAN b. Ring LAN c. Mesh LAN d. All of the above
Last Answer : a. Star LAN
Description : The computer network is A) Network computer with cable B) Network computer without cable C) Both of the above D) None of the above
Last Answer : C) Both of the above
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 a token ring network the transmission speed is 10^7 bps and the propagation speed is 200 metres/micro second. The 1- bit delay in this network is equivalent to: a. 500 metres of cable. b. 200 metres of cable. c. 20 metres of cable. d. 50 metres of cable
Last Answer : c. 20 metres of cable.
Description : Which transmission media provides the highest transmission speed in a network? a. coaxial cable b. twisted pair cable c. optical fiber d. electrical cable
Last Answer : c. optical fiber
Description : In which topology, if a computer’s network cable is broken, whole network goes down. a. Ring b. Star c. Bus d. token ring
Description : S/NET is another kind of ………….network with an ………….for switching. A. fiber optic, active star B. active star , fiber optic C. twisted cable, active network D. active network, twisted cable
Last Answer : A. fiber optic, active star
Description : What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences? a) Unshielded twisted pair b) Optical fiber c) Coaxial cable d) Microwave
Last Answer : b) Optical fiber
Description : Which transmission media provides the highest transmission speed in a network? a) coaxial cable b) twisted pair cable c) optical fiber d) electrical cable
Last Answer : c) optical fiber
Description : Inthe _________ protocol weavoid unnecessary transmissionby sending only frames that are corrupted. A) Stop-and-Wait ARQ B) Go-Back-N ARQ C) Selective-Repeat ARQ D) none of the above
Last Answer : Selective-Repeat ARQ
Description : The Hamming distance between equal codewords is _________. A) 1 B) n C) 0 D) none of the above
Last Answer : 0
Description : A(n)_________ signal is a composite analogsignal with an infinite bandwidth. A) digital B) analog C) either (a)or (b) D) neither (a) nor (b
Last Answer : digital
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 : 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 : We candivide today's networks into ____ broad categories. A) four B) three C) five D) two
Last Answer : three
Description : In IPv6,a ______address is used ifa site with several networks uses the Internetprotocols but is not connectedto the Internet for security reasons. A) link local B) site local C) mapped D) none of the abov
Last Answer : site local
Description : In networks thatdo not support physical multicastaddressing, multicastingcan be accomplished through _______. A) mapping B) queries C) tunneling D) noneof the above
Last Answer : tunneling
Description : In ________, the multicastpacket must reach only those networks that haveactive members for thatparticular group. A) RPF B) RPB C) RPM D) none of the above
Last Answer : RPM
Description : For purposes of routing, the Internet isdivided into ___________. A) wide area networks B) autonomous networks C) autonomous systems D) none of the above
Last Answer : autonomous systems