JKSSB Written 2026
Answer & Explanation
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Correct Answer:
Option A —
TCP guarantees delivery and the correct order of packets, but not the timing.
Analysis of StatementsA) TCP guarantees delivery and the correct order of packets, but not the timing: (True)
TCP is a connection-oriented protocol. it uses acknowledgments and sequence numbers to ensure every packet arrives and is reassembled in the right order. However, it is "jittery" because it retransmits lost packets, meaning it cannot guarantee exactly when the data will arrive.
B) TCP is faster than UDP because it does not perform any error checking: (False)
The opposite is true. UDP (User Datagram Protocol) is faster precisely because it lacks the overhead of error checking, flow control, and acknowledgments. TCP is slower due to its "three-way handshake" and rigorous error-correction mechanisms.
C) IPv6 uses 256-bit addresses, but the header size is fixed at 40 bytes: (False)
While the IPv6 header is indeed fixed at 40 bytes to streamline processing, the address size is 128-bit, not 256-bit.
D) ICMP is used primarily for application-layer data transfer between web servers: (False)
ICMP (Internet Control Message Protocol) operates at the Network Layer. It is used for diagnostic and error-reporting purposes (like the ping and traceroute commands), not for transferring application data like web pages or files.
Summary of Errors in Options B, C, and D
UDP is the "fast" protocol, not TCP.
IPv6 addresses are 128 bits long (2
128
total addresses).
ICMP is a network management protocol, whereas HTTP/HTTPS handles web server data transfer.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.