Computer Networks Online Test 1

1.Accounting functions are the responsibility of- network layer
2.In a n/w with 25 computers,with topology would require the most
extension
calling-mesh
3.which protocol is used for electronic mail-SMTP
4.In the earlier ARPANET each node of n/w consists-IMP & HOST
5.Irregular topologies r used in-WAN
6.In microwave transmission concentrating all the energy into a small
beam using a
parabolic antenna gives a -higher-signal to noise ratio
7.In LAN with token ring topology -source routing-are used
8.which type of switching uses the entire capacity -circuit switching-
9.PBX-private branch exchange
10.which ALL type is designed to support a data stream that has the
constant bit
rate -ALL1-
11.-ALOHA-system is used for ground based radio broadcasting
12.Busy waiting is found in persistent CSMA
13.In 802.3 the address consisting of all 1 bits is reversed for
-broadcast-
14.FDDI is an acronym for-fibre distributed data interface-
15.The data link layer must use the service provided to it by
the-physical layer
16.In CRC there is no error in the remainder at the receiver is-zero-
17.-sequence number- is used number the frames
18.Receiving data link layer store all correct frames following bad one
is
-pipelining repeat-
19.2 type value tells the header to stop sending
20.(ans)character-oriented protocol
21.multiplexing and demultiplexing of n/w connections is by-transport
layer-
22.a cable break in a bus topology stops all transmission
23.HTTP-Hypertext Transfer Protocol
24.In the earlier ARPANET each node of n/w consisted-IMP &host-
25.when packets are small and all are equal sized then they are
called-cells-
26.Intra red transmission has more suitable for indoor wireless LAN's
27.source routing bridges complex-hardware-
28.The operation of subset is controlled by-n/w layer-
29.BUS topology requires the multipoint connection
30.The protocol used in transport layer of noval netware-NCP&SPX
31.In static allocation of channel in LAN broad cast netware -round
robin-algorithm is used
32.a modem application to connect the LAN's in building is through
-light wave transmission-
33.accounting function are the responsibility of ___ layer-network layer
34.in a mesh topology the relationship b/w one device and another
is-peer to per
35.which protocol is used for electronic mail-SMTP
36.in the earlier ARPANET each node of N/W consisted-IMP&host
37.when pacckets are small and all are equal sized then they are
called-small packets
38.lasers face a enhibition on- sunny day
39.in transparent bridges the failures are handeled by-router
40.in a time division switch a____ governs the destination of a packet
stored in LAN-cross point
41.equipment that performs functions related to the OSI models layers
1,2&3 is called_NTI
42.which AAL type can best process a data stream havin a non-constant
bit rate-AAL1
43.HDLC is-bit oriented protocol
44.protocol which is widely used LAN in the MAL sub layer-CSMA/CD
45.a problem with bit map protocol in an overhead of____bits per
station-2
46.in token ring,where is the token when a data frame is in circulation
-in the intermediate mode
47.the approach for DLL to break the bit stream up into discreet parts
is-naming
48.in cyclic redundancy checking,the diviser is________ the CRC two
s bits- more than
49.________ is used to num,ber the frames-sequence number
50.__ calls the retransmission of the specified frame-type3
51.____is used to indicate that there is transmission eror-type2
52.in 802.3 the high order bit of destination address is a '0' for
addresses-broadcast
53.the protocol usd by in transparent layer of novell n/w-NCP&SPX
54.wires in WAN are connected by-subnet
55.the ISDN equivalent DTE is-TE1
56.____fiield on UNI cell header is used for connection process-VCI
57.the channel efficiency binary count down protocol is-d/(d+log2M)
58.collision checking is an-anolog process
59.the protocol used in ethernet is-CSMA/CD
60.in token bus how does a station tranmit data to the destination
node-bysizing token
61.the DLL service is to provide data from n/w layer on the source
machine to-destination machine
62.at the CRC generator_____ are added to data unit after the division
process-0's
63.in finite state machine model (S,M,I,T) is set of-frames
64.the various type of super visory frames are distinguished by______
field-type
65.BSC stands for-binary synchronous communication
66. a repeater takes weakened or corrupted signal and_________
it-regenerates
67.in micro wave transmission connectors all carry into smalll beams
using a porabolic antena gives signal to noise ratio higher.
68.The info related to multiprogramming hosts is placed in thew header
of_________ layer-transport layer
69.security and privacy are less of an issue for devices in a _____
topology-bus topology.
70.which protocol is used for e-mail?-SMTP.
71.the IP in TCP/IP uses ______ bit addresses but IPX in novell n/w uses
_____ bit addresses-4,12.
72.the IEEE standard for DQDB is____-802.6
73.________ category twisted pairs are called unshielded twisted
pairs-category 3
74.In source routing bridges each LAN has unique _____ bit numbers-12
75.the _________ is a device that connects 'n'inputs to 'm' o/p's-cross
bar
76.ISDN is an acronym for -Integrated Services Digital N/w
77.the ATM ________ sublayer is concerned with fetting the bits on and
off the wire-physical laYER
78.the max through put of pure ALOHA system is-18.4%
79.an early protocol for wireless lans is-MACA
80.in token ring the length of token is -3 bytes
81.in token ring,where is the token when a data prone is in
circulation?-at the sending station
82.DLL provides service to __ layer-network layer
83.which erreo detection method uses one's complement
arithmetic?-checksum
84.in unrestricted simplex protocol,seq numbers and ________ are not
used?-acknowledgement
85.receiving DLL store all correct frames following bad one is
-pipelining repeat
86._______is used to indicate that there is transmission error-type 3
87.the HDLC _______ field defines the biginning and end of frame-flag
88.a n/w that contains multiple hubs is-tree
89.in earlier arpanet each mode of n/w consists privately owned
networks are-internet and host
90.which of these is connection oriented protocol?-TCP
91.as we go from long wave radio towards visible light-light radio
92.frame boundaries are recognized are created by-session layer
93.which topology requires a multipt connection?-bus
94.novell n/w is based on-XNS
95.the functionsinternet layer in tcp/ip are-cc and p[acket routing
96.which of the following is not a characteristic of lan-size
97.the mode of transmission most useful is-wireless
98.In LAN with token ring topology __________ are used-source routing
99.the normal user interface to an isdn is PRI or-bitrate interface
100.in a ______ switch ,both.the VPI,VCI can changes-VPC
101.protocol is widely used on lan in the MAC sublayer-CSMA/CD
102.in CSMA/CD the time taken is-2t
103.802.3 baseband use _____________ encoding-manchester
104.which will not happen at token ring station-correcting error
105.if source machine sending independent frames to destination
machine-unack oriented
106.function of physical layer is-determine number of volts to represent
1&0
107.a tree topology is a variation of a________ topology-star
108.which of the layers of tcp/ip-host to
n/w,internet,transport,application
109.internet is based on -TCP/IP protocol stack
110.traditional LAN run at speed-100 to 1000mbps
111.CSMA/CD & token bus user choose _______bridge-transport
112.____________ is bi-directional & is more robust protocol-sliding
window
113._______ is used to indicate transmission error-type 3
114.BSC stands for-binary sync communication
115. The channel efficiency of bitmap protocol at high load is ----------------------------- d/(d+1)
116. An early protocol for wireless LANs is ----------------------------------------------------- maca
117. In 802.3 the higher order bit of the destination address is a 0's -------------------ardary address
118. In token ring, where is the token when a data frame is in circulation?--------------------At the sending station
119. When connection oriented service is used, transfer have destinct phase------------------Two
120. If the ASCII character H is sent and I is received what type of error is this------------------Single bit
121. In unrestricted simplexx protocol, sequence numbers and _______ are not used-----------------------------Achar
122. The technique of temporary delaying outgoing ack so that they can loaded -------------------------------Piggy backing
123. The shortest frame in HDLC protocol is ______frame-----------------------------------
124.Two sides cannot attempt the same operation at the same time. This property is accomplished by _____ layer-------------------session layer
125. In a ____ topology, if there are in devices in a network, each device has n-1 part for cables ----------------------------------------- mesh
126. Which layer contains high level protocols in TCP/IP model-------------------------------Application
127. Mini computers in ARPANET are called _____ ------------------IMP
128. Traditional LAN's run at the speed of -----------------------10 to 100 MBPS
129 The no. of oscillations per second of an electromagnetic wave is called its _____ and is measured in _____---------------------frequency, Hz
130. A bridge has access to the_______ address of a station 0on the same network------------------------- physical
ONLY ANSWERS FOR QUESTIONS
1. Noise free
2. accept
3. LCP
4. High level Data Link Control
5. 5
6. mesh (n-1) port
7. connection less & unreliable
8. DNS
9. subnet
10. noise reduction
11. Transparent bridge
12. before
13. 16 kbps analog channel
14. AAL2
15. d/(d+log 2N)
16. hidden station problem
17. Thick
18. By seizing token
19. bit stuffing
20. VRL
only Answers(questions not available)
1.before
2.TE 1
3.AAL 2
4.1-persistant CSMA
5.10 base T
6.by seizing token
7.sequence number
8.p/s bit
9.regenrating
10.crossbar
11.AAL 1
12.tree and depth first
13.thin
14.charstuff
15.the msg not copied
16.p/f bit
17.piggy backing
18.error detection
19.acknowledgement
20.single bit
21.16 kbps