1
GATE CSE 2022
Numerical
+1
-0.33

Consider a 100 Mbps link between an earth station (sender) and a satellite (receiver) at an altitude of 2100 km. The signal propagates at a speed of 3 $$\times$$ 108 m/s. The time taken (in milliseconds, rounded off to two decimal places) for the receiver to completely receive a packet of 1000 bytes transmitted by the sender is _____________.

2
GATE CSE 2022
Numerical
+1
-0.33

Consider the data transfer using TCP over a 1 Gbps link. Assuming that the maximum segment lifetime (MSL) is set to 60 seconds, the minimum number of bits required for the sequence number field of the TCP header, to prevent the sequence number space from wrapping around during the MSL is ___________.

3
GATE CSE 2019
+1
-0.33
Which of the following protocol pairs can be used to send and retrieve e-mails (in that order)?
A
IMAP, SMTP
B
SMTP, POP3
C
IMAP, POP3
D
SMTP, MIME
4
GATE CSE 2018
Numerical
+1
-0
Consider a long-lived $$TCP$$ session with an end-to-end bandwidth of $$1$$ $$Gbps$$ ($$= {10^9}\,$$ bits-persecond). The session starts with a sequence number of $$1234.$$ The minimum time (in seconds, rounded to the closest integer) before this sequence number can be used again is _______.
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