Test: Application Layer Protocols - Computer Science Engineering (CSE) MCQ

HTTP - stateless
FTP - stateful
TCP - not application layer protocol
POP3 - Stateful
And according to options answer would be C)

The answer is C.
Where quick response is needed, there UDP is preferred.

OPTION A
Its transport layers responsibility to divide data in to fragments/ packets. Application layer need not worry about it.

011111 *one zero emitted here* 0101

Answer->C
CSMA/CD was used in early days,802.3 not in 802.11
There will be contention in this protocol.
Ethernet is based on csma/cd early in 1980s,

Since CSMA/CD
Transmission Delay = RTT
hence,
L=B RTT
L=B 2 Tpropagation delay
L=(20 106) 2 40 10-6
=20 2 40
=1600bits
=200bytes
Hence 200Bytes is the answer.

Answer is C)
A & B are clearly wrong as we are doing Reverse lookup.
C is most closest answer to process given in RFC 1033. We need to get NS for in-addr.arpa before doing query to
8.16.128.145.in-addr.arpa
D is not correct, it is not close to process.

A) Traceroute works by sending packets with gradually increasing TTL value, starting with TTL value of 1. The first router receives the packet, decrements the TTL value and drops the packet because it then
has TTL value zero. The router sends an ICMP Time Exceeded message back to the source. The next set of packets are given a TTL value of 2, so the first router forwards the packets, but the second router
drops them and replies with ICMP Time Exceeded. Proceeding in this way, traceroute uses the returned ICMP Time Exceeded messages to build a list of routers that packets traverse, until the destination is
reached and returns an ICMP Echo Reply message

(C) Message is answer.
For Application, Presentation and Session layers, the PDU is message
For Transport layer, PDU is segment for TCP and datagram for UDP
For Network layer, PDU is packet
For Datalink layer, PDU is frames
For physical layer, PDU is stream of bits