Gate Exam

Assume that source S and destination D are connected through two intermediate routers labeled R. Determine how many times each packet has to visit the network layer and the data link layer during a transmission from S to D.

Option
(A) Network layer -4 times and Data link layer-4 times
(B) Network layer -4 times and Data link layer-3 times
(C) Network layer -4 times and Data link layer-6 times
(D) Network layer -2 times and Data link layer-6 times

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Gate Other Question

An index is clustered, if
(A) it is on a set of fields that form a candidate key.
(B) it is on a set of fields that include the primary key.
(C) the data records of the file are organized in the same order as the data
entries of the index.
(D) the data records of the file are organized not in the same order as the data
entries of the index. The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are

Option
(A) TCP, UDP, UDP and TCP
(B) UDP, TCP, TCP and UDP
(C) UDP, TCP, UDP and TCP
(D) TCP, UDP, TCP and UDP