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1

GATE CSE 2008

MCQ (Single Correct Answer)
In the slow start phase of the TCP congestion control algorithm, the size of the congestion window
A
does not increase
B
increases linearly
C
increases quadratically
D
increases exponentially
2

GATE CSE 2004

MCQ (Single Correct Answer)
Suppose that the maximum transmit window size for a TCP connection is 12000 bytes. Each packet consists of 2000 bytes. At some point of time, the connection is slow start phase with a current transmit window of 4000 bytes. Subsequently, the transmitter receiver two acknowledgments. Assume that no packet are lost and there are no time-outs. What is the maximum possible value of the current transmit window?
A
4000 bytes
B
8000 bytes
C
10000 bytes
D
12000 bytes
3

GATE CSE 2004

MCQ (Single Correct Answer)
A TCP message consisting of 2100 bytes is passed to IP for delivery across two networks. The first network can carry a maximum payload of 1200 bytes per frame and the second network can carry a maximum payload of 400 bytes per frame, excluding network overhead. Assume that IP overhead per packet is 20 bytes. What is the total IP overhead in the second network for this transmission?
A
40 bytes
B
80 bytes
C
120 bytes
D
160 bytes
4

GATE CSE 2004

MCQ (Single Correct Answer)

Consider three IP networks A, B and C. Host HA in networks A sends messages each containing 180 bytes of application data to a host HC in network C. The TCP layer prefixes a 20 byte header to the message. This passes through an intermediate network B. the maximum packet size, including 20 byte IP header, in each network is:

A : 1000 bytes
B : 100 bytes
C : 1000 bytes

The network A and B are connected through a 1 Mbps link, while B and C are connected by a 512 Kbps link (bps = bits per second).

What is the rate at which application data is transferred to host HC? Ignore errors, acknowledgements, and other overheads.
A
325.5 Kbps
B
354.5 Kbps
C
409.6 Kbps
D
512.0 Kbps

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