1
GATE CSE 2009
MCQ (Single Correct Answer)
+2
-0.6
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 increments once per millisecond. The maximum packet lifetime is given to be 64s.

Which one of the choices given below is closest to the minimum permissible rate at which sequence numbers used for packets of a connection can increase?

A
0.015/s
B
0.064/s
C
0.135/s
D
0.327/s
2
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
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
3
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
A client process P needs to make a TCP connection to a server process S. Consider the following situation: the server process S executes a socket( ), a bind( ) and a listen( ) system call in that order, following which it is preempted. Subsequently, the client process P executes a socket( ) system call followed by connect( ) system call to connect to the server process S. The server process has not executed any accept( ) system call. Which one of the following events could take place?
A
connect( ) system call returns successfully
B
connect( ) system call blocks
C
connect( ) system call returns an error
D
connect( ) system call results in a core dump
4
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
A computer on a 10 Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2 Mbps. It is initially filled to capacity with 16 Megabits. What is the maximum duration for which the computer can transmit at the full 10 Mbps?
A
1.6 seconds
B
2 seconds
C
5 seconds
D
8 seconds
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