Description : ______ isa standard developed by ITU-T. A) SONET B) SDH C) either (a) or (b) D) neither (a) nor (b)
Last Answer : either (a) or (b)
Description : SDH hasdefined ahierarchy of signals called ________. A) STSs B) STMs C) either (a) or (b) D) neither (a) nor (b)
Last Answer : STSs
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 : A linear SONET network can be __________. A) point-to-point B) multipoint C) either (a) or (b) D) neither (a) nor (b)
Last Answer : point-to-point
Description : _______ is a standard developed by ANSI for fiber-optic networks.
Last Answer : SONET
Description : Who developed standards for the OSI reference model? A. ISO B. ANSI C. IEEE D. ACM
Last Answer : A. ISO
Description : Who developed standards for the OSI reference model? a. ISO - International Standards Organization b. ANSI - American National Standards Institute c. IEEE - Institute of Electrical and Electronics Engineers d. ACM - Association for Computing Machinery
Last Answer : a. ISO - International Standards Organization
Description : ANSI X.12 is a standard developed by a. American National Standard Institute b. International Standard Institute c. European Common Market d. United Nations Economic Commission for Europe
Last Answer : a. American National Standard Institute
Description : The document standards for EDI were first developed by large business house during the 1970s and are now under the control of the following standard organisation: (A) ISO (B) ANSI (C) ITU-T (D) IEEE
Last Answer : (B) ANSI
Description : In IEEE 802.11, _______ isan optionalaccess method that can be implemented inan infrastructure network (not in an ad hocnetwork). A) DCF B) PCF C) either (a) or (b) D) neither (a) nor (b)
Last Answer : PCF
Description : In IEEE 802.11, a BSS with an AP is sometimes referred toas ____________. A) an ad hocarchitecture B) an infrastructurenetwork C) either (a) or (b) D) neither (a) nor (b)
Last Answer : an infrastructurenetwork
Description : In IEEE 802.11, a BSS without an AP is called an _________. A) an ad hocarchitecture B) an infrastructurenetwork C) either (a) or (b) D) neither (a) nor (b)
Last Answer : an ad hocarchitecture
Description : ________ is actually a multiport repeater. It is normally usedto createconnections between stations in a physical star topology. A) An activehub B) A passivehub C) either (a)or (b) D) neither (a) nor (b)
Last Answer : An activehub
Description : _______ ispart of the media; its location in the Internet model is below thephysical layer. A) An activehub B) A passivehub C) either (a)or (b) D) neither (a) nor (b)
Last Answer : A passivehub
Description : In astar-topology Ethernet LAN, _______ is just a point where the signals coming from different stations collide; it is thecollision point. A) An activehub B) A passivehub C) either (a)or (b) D) neither (a) nor (b)
Description : _________is just aconnector. A) An activehub B) A passive hub C) either (a)or (b) D) neither (a)nor (b)
Last Answer : A passive hub
Description : A backbone is usually a ______. A) bus B) star C) either (a)or (b) D) neither (a) nor (b)
Last Answer : either (a)or (b)
Description : Analog-to-analog conversionis needed if the available bandwidthis _______. A) low-pass B) band-pass C) either (a)or (b) D) neither (a) nor (b)
Last Answer : band-pass
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 : Signals can be ________. A) analog B) digital C) either (a)or (b) D) neither (a) nor (b)
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
Description : Frame Relay provides ________. A) PVCs B) SVCs C) either (a) or (b) D) neither (a) nor (b)
Last Answer : Frame Relay
Description : The …………………... option tells netstat to display the status of all configured network interfaces. A. -n B. -i C. either a or b D. neither a nor b
Last Answer : B. -i
Description : _____ is an ideaor concept that isa precursor to an Internet standard. A) RCF B) RFC C) ID D) none of the above
Last Answer : RCF
Description : Each ________in a SONET framecancarry a digitized voice channel. A) bit B) byte C) frame D) none of the above
Last Answer : byte
Description : In SONET, for each byte, the bitsare transmitted ____________. A) from least significant to the most significant B) from most significant tothe least significant C) two at atime D) three at atime
Last Answer : from least significant to the most significant
Description : In SONET, for each frame, the bytes are transmitted __________. A) from left to the right, top to bottom B) from right to theleft, bottom to top C) from left to the right, bottom to top D) from right to the left, top to bottom
Last Answer : from left to the right, bottom to top
Description : To make SONET backward-compatible with the current hierarchy, its framedesign includes asystem of. A) OCs B) STMs C) STSs D) VTs
Last Answer : VTs
Description : SONET network topologies can be__________. A) linear B) ring C) mesh D) all of theabove
Last Answer : ring
Description : In SONET each frame lasts _______ microseconds. A) 20 B) 64 C) 128 D) none of the above
Last Answer : 64
Description : SONET sends ________ frames per second A) 1000 B) 2000 C) 4000 D) 8000
Last Answer : 2000
Description : A SONET system can use _________. A) STS multiplexers B) regenerators C) add/drop multiplexers D) all of theabove
Last Answer : add/drop multiplexers
Description : SONET is a _______ TDM system. A) asynchronous B) synchronous C) statistical D) none of the above
Last Answer : none of the above
Description : SONET defines _______ layers. A) two B) three C) four D) five
Last Answer : four
Description : When a key is pressed on the keyboard, which standard is used for converting the keystroke into the corresponding bits? A) ANSI B) ASCII C) EBCDIC D) ISO
Last Answer : Answer : A
Description : When a key is pressed on the keyboard,which standard is used for converting the keystroke into the corresponding bits 1) ANSI 2) ASCII 3) EBCDIC 4) ISO
Last Answer : 1) ANSI
Description : When a key is pressed on the keyboard,which standard is used for converting thekeystroke into the corresponding bits 1 ANSI 2 ASCII 3 EBCDIC 4 ISO
Last Answer : 1 ANSI
Description : A data terminal serves as an a. Effector b. sensor c. both a and b d. neither a nor b
Last Answer : both a and b
Description : In__________, eachstation is forced to send only at the beginning of the time slot. A) pure ALOHA B) slotted ALOHA C) both (a) and (b) D) neither (a) nor (b)
Last Answer : slotted ALOHA
Description : Gigabit Ethernet access methods include _______ mode. A) half-duplex B) full-duplex C) both (a) and (b) D) neither (a) nor (b)
Last Answer : both (a) and (b)
Description : In___________ thereis alwaysa transition at the middle of the bit, but thebit values are determined at the beginningof the bit. If the nextbit is 0, there is a transition; if the next bit is 1, there is none. A) Manchester B) differential Manchester C) both (a) and (b) D) neither (a) nor (b)
Last Answer : differential Manchester
Description : In_______encoding, the duration of the bit is divided into twohalves. Thevoltage remains at one level during thefirst half and moves to the other level in the second half. The transition at the middle of the bit ... Manchester B) differential Manchester C) both (a) and (b) D) neither (a) nor (b)
Description : The idea of RZ andthe ideaof NRZ-I are combined into the ________ scheme. A) Manchester B) differential Manchester C) both (a) and (b) D) neither (a) nor (b)
Description : The idea of RZ andthe ideaof NRZ-L are combined into the ________ scheme. A) Manchester B) differential Manchester C) both (a) and (b) D) neither (a) nor (b)
Last Answer : Manchester
Description : In______, the changeor lackof change in the level of the voltagedetermines the value of the bit. A) NRZ-I B) NRZ-L C) both (a)and (b) D) neither (a) nor (b)
Last Answer : NRZ-I
Description : In_____, the level of the voltagedetermines the valueof the bit. A) NRZ-I B) NRZ-L C) both (a) and (b) D) neither (a) nor (b)
Last Answer : NRZ-L
Description : _________ does not provide reliable end to end communication. a. TCP b. UDP c. Both TCP and UDP d. Neither TCP nor UDP
Last Answer : b. UDP
Description : A ……………………….. is built from the information exchanged by routing protocols. A. static routing table B. dynamic routing table C. both a and b D. neither a nor b
Last Answer : B. dynamic routing table