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Recent questions tagged computer-networks

1 votes
0 answers
1802
Access control method
please tell me name of access control method in data link layer which are needed for gate 2018?
please tell me name of access control method in data link layer which are needed for gate 2018?
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1 votes
0 answers
1803
IP v6 Flow label size
What is the size of flow label in IPV6 header? In forouzan it is 24 bits but in tanenbaum it is 20 bits.Please some confirm?
What is the size of flow label in IPV6 header? In forouzan it is 24 bits but in tanenbaum it is 20 bits.Please some confirm?
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7 votes
2 answers
1804
CN: TCP Window Size
Consider TCP congestion control. Assuming RTT as 4 seconds and segment size as 3KB, if bandwidth is 500kbps, what is the smallest window size for which there is no stalling in this case?
Consider TCP congestion control. Assuming RTT as 4 seconds and segment size as 3KB, if bandwidth is 500kbps, what is the smallest window size for which there is no stalli...
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2 votes
1 answer
1805
Cn: Transport layer protocol
Which of the following transport layer protocols used to support email? a:) SMTP b:) TCP c::)UDP d) both b and c
Which of the following transport layer protocols used to support email?a:) SMTPb:) TCPc::)UDPd) both b and c
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7 votes
3 answers
1806
Cn: Optimal windows size
The round trip delay between x and y is given as 60 ms and bandwidth of link between X and Y is 512 KBps. What is the optimal window size (in packets) if the packet size is 64 bytes and channel is full duplex
The round trip delay between x and y is given as 60 ms and bandwidth of link between X and Y is 512 KBps. What is the optimal window size (in packets) if the packet size...
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1 votes
1 answer
1810
Cn Linear block code
Which of the following are linear block codes?Remember exor of two valid linear block codes is a valid codeword a) CRC b) Hamming code c) Simple parity d)All e)None
Which of the following are linear block codes?Remember exor of two valid linear block codes is a valid codeworda) CRCb) Hamming codec) Simple parityd)Alle)None
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1 votes
0 answers
1812
CN Network Security
Message digest provides only message authentication or can it provide user authentication also? MDC is a digest for message authentication.Can i also say MAC is also a digest for sender authentication?Please explain this
Message digest provides only message authentication or can it provide user authentication also?MDC is a digest for message authentication.Can i also say MAC is also a dig...
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2 votes
2 answers
1813
forouzan 5th edition chapter2 Q2-3
A router connects three links (networks). How many of each of the following layers can the router be involved with? a.physical layer b. data-link layer c. network layer
A router connects three links (networks). How many of each of the followinglayers can the router be involved with?a.physical layer b. data-link layer c. network layer
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2 votes
2 answers
1814
foruozan 5th edition chapter1 Q1-13
How many point-to-point WANs are needed to connect n LANs if each LAN should be able to directly communicate with any other LAN?
How many point-to-point WANs are needed to connect n LANs if each LANshould be able to directly communicate with any other LAN?
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2 votes
1 answer
1815
Forouzan 5th edition ch01 Q1-12
In a LAN with only a single link-layer switch Host 1 wants to send a message to Host 2. Since communication is through the link-layer switch, does the switch need to have an address? Explain.
In a LAN with only a single link-layer switch Host 1 wants to send a messageto Host 2. Since communication is through the link-layer switch, does theswitch need to have ...
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7 votes
2 answers
1816
CN ARQ Protocol
True / False? Selective repeat ARQ requires more number of bits in sequence number as compared to Go Back n ARQ.
True / False?Selective repeat ARQ requires more number of bits in sequence number as compared to Go Back n ARQ.
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4 votes
2 answers
1817
CN SMTP Protocol
SMTP is state full or stateles?
SMTP is state full or stateles?
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3 votes
1 answer
1818
CN Slow Start Throughput
R.T.T=10 microsec. M.S.S=100 Bytes Slow start protocol used to send data.Sender needs to send data till it completes sending window size 8MSS.Find:- a. Total Time taken b. Throughput for 1st RTT c. Total Throughput d. Average Throughput
R.T.T=10 microsec.M.S.S=100 BytesSlow start protocol used to send data.Sender needs to send data till it completes sending window size 8MSS.Find:-a. Total Time takenb....
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0 votes
1 answer
1819
Computer Network
Can anyone explain both the question don't give any random answer
Can anyone explain both the question don't give any random answer
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0 votes
0 answers
1821
CN Calculate Number of hosts
The Internet is roughly doubling in size every 18 months. Approximate estimates put the number of hosts on it at 7 million in January 1996. Use this data to compute the expected number of Internet users in the year 2008. Can i apply compound interst formula here?
The Internet is roughly doubling in size every 18 months. Approximate estimates put the number of hosts on it at 7 million in January 1996. Use this data to compute the e...
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1 votes
1 answer
1822
CN Topology
The internet is a collection of redundant high speed wide area links.Which network topology does the internet use? 1. Star 2. Ring 3.Mesh 4.Bus Please give valid reason to supprt your answer.
The internet is a collection of redundant high speed wide area links.Which network topology does the internet use? 1. Star2. Ring3.Mesh4.BusPlease give valid reason to su...
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2 votes
1 answer
1823
CN Boot P Protocol
In bootp protocol client puts all 0 in source IP and broadcast the packet.Then relay agent encapsulate that in a unicast packet and send to boot p server. How does boot p server know the Mac address of the client to which it is assigning the address ?
In bootp protocol client puts all 0 in source IP and broadcast the packet.Then relay agent encapsulate that in a unicast packet and send to boot p server.How does boot p ...
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3 votes
2 answers
1824
CN ARP RARP
At which layer,ARP and RARP works?
At which layer,ARP and RARP works?
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3 votes
2 answers
1826
CN Data link layer
True/False:- 1. The communication between Network layer and Mac sublayer is contention less. 2. The communication between Network layer and LLC sublayer is contention less.
True/False:-1. The communication between Network layer and Mac sublayer is contention less.2. The communication between Network layer and LLC sublayer is contention less....
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2 votes
1 answer
1827
CN Maximum sender window Size
In every sliding window protocol,the maximum sender window size is the number of frames that can be transferred by sender in RTT? Is this statement true?
In every sliding window protocol,the maximum sender window size is the number of frames that can be transferred by sender in RTT?Is this statement true?
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1 votes
0 answers
1829
Computer Networking ip address questions
What will be the ip address-A, subnet mask-B, default gateway-C for the router A given in the below diagram Find A,B,C?
What will be the ip address-A, subnet mask-B, default gateway-C for the router A given in the below diagramFind A,B,C?
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2 votes
3 answers
1830
computer network Subnet Mask
A class C network is assigned with a subnet mask of 255.255.255.248 . The total number of hosts possible in all the sub networks together in the above network is ....... Please help me to find the answer...
A class C network is assigned with a subnet mask of 255.255.255.248 . The total number of hosts possible in all the sub networks together in the above network is .......P...
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