GATE Computer Science Exam Practice paper - 6 Online Test

In a packet switching network, packets are routed from source to

destination along a single path having two intermediate node. If the

message size is 24 bytes and each packet contains a header of 3 bytes,

then the optimum packet size is


Suppose the round trip propagation delay for a 10 Mbps Ethernet

having 48-bit jamming signal is 46.4 µs . The minimum frame size is :


For which one of the following reason: does Internet Protocol (IP) use

the time-to-live (TTL) field in the IP datagram header?


Station A uses 32 byte packets to transmit messages to Station B

using a sliding window protocol. The round trip delay between A and

B is 80 milliseconds and the bottleneck bankwidth on the path

between aA and B is 128 kbps. What is the optimal window size that

A should use ?


Two computers C1 and C2 are configured as follows. C1 has IP

address 203. 197.2.53 and netmask 255.255. 128.0. C2 has IP address

203.197.75.201 and netmask 255.255.192.0. Which one of the following

statements is true?


Station A needs to send a message consisting of 9 packets to Station

B using a siding window (window size 3) and go-back-n error

control strategy. All packets are ready and immediately available for

transmission. If every 5th packet that A transmits gets lost (but no

acks from B ever get lost), then what is the number of packets that

A will transmit for sending the message to B ?


In Ehernet when manchester encoding is used, the bit rate is


Which one of the following uses UDP as the transport protocol?


In a token ring network the transmission speed is 10 bps and the

propagation speed is 200 metres/µs . The 1-bit delay in this network

is equivalent to;


The address of a class B host is to be split into subnets with a 6-bit

subnet number. What is the maximum number of subnets and the

maximum number of hosts in each subnet?

































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This test paper is for all GATE Computer Science aspirants for their practice.
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Mridul Kumar

Computer science doesn't mean networking only

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