CN |Gate-2006| Computer Networks 1. For which one of the following reasons does Internet Protocol (IP) use the time-to- live (TTL) field in the IP datagram header? [GATE – 2006] a. Ensure packets reach destination within that timeb. Discard packets that reach later than that timec. Prevent packets from looping indefinitelyd. Limit the time for …
CN |Gate-2007| Computer Networks 1. In Ethernet when Manchester encoding is used, the bit rate is: [GATE – 2007] a. Half the baud rate.b. Twice the baud rate.c. Same as the baud rate.d. None of the above. Answer : a) 2. Which one of the following uses UDP as the transport protocol? [GATE – 2007] …
CN |Gate-2008| Computer Networks What is the maximum size of data that the application layer can pass on to the TCP layer below? [GATE – 2008] a. Any sizeb. 216 bytes-size of TCP headerc. 216 bytesd. 1500 bytes Answer : a) Which of the following system calls results in the sending of SYN packets? [GATE – 2008] …
CN |Gate-2009| Computer Networks While opening a TCP connection, the initial sequence number is to be derived using a time-of-day (ToD) clock that keeps running even when the host is down. The low order 32 bits of the counter of the ToD clock is to be used for the initial sequence numbers. The clock counter …
CN |Gate-2010| Computer Networks One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field? [GATE – 2010] a. It can be used to prioritize packetsb. It can be used to reduce delaysc. It can be used to …
CN |Gate-2011| Computer Networks A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT [GATE – 2011] a. block entire HTTP traffic during 9:00PM and 5:00AMb. block all ICMP trafficc. stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd. block …
CN |Gate-2012| Computer Networks The protocol data unit (PDU) for the application layer in the Internet stack is [GATE – 2012] a. segmentb. datagramc. messaged. Frame Answer : c) Which of the following transport layer protocols is used to support electronic mail? [GATE – 2012] a. SMTPb. IPc. TCPd. UDP Answer : c) In the …
CN |Gate-2013| Computer Networks The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are: [GATE – 2013] a. TCP, UDP, UDP and TCPb. UDP, TCP, TCP and UDPc. UDP, TCP, UDP and TCPd. TCP, UDP, TCP and UDP Answer : c) Using public key cryptography, X adds a digital …
CN |Gate-2014| Computer Networks 1. Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links. [GATE – 2014] [S1] The computational overhead in link state protocols is higher than in distance vector protocols.[S2] A distance vector protocol (with split horizon) avoids …
CN |Gate-2015| Computer Networks 1. Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are False with respect to the TCP connection? [GATE – 2015] 1. If the sequence number of a segment is m, then the sequence number of the subsequent segment is always m+1. 2. If the …