Computer Networks Subcategories

Basics	Network Layer
Freshers	Ripv1
Http	Application Layer
Cookie	Internet
Entrance Exams	Analyzing Subnet Mask
Ipv4 Ipv6 Comparison	Ipv4
Experienced	Dv Routing Algorithms
Http Ftp	Port
Campus Interviews	Computer Networks
Frame Relay 2	Atm Frame Relay
Network Topology Set 2	Snmp Operations
Snmp	Topology
Mac Address	Reliable Data Transfer
Acl	Mail Access Protocols
Routers Functionalities Basics	Ls Routing Algorithms
Cidr	Vlan
Bgp	Broadcast Routing
Hierarchical Routing	Switches Hubs
Error Detection Correction Techniques	Multiple Access Links Protocols
Symmetric Key Cryptography	Public Key Cryptography
Hash Functions	Digital Signatures
Cisco Lan Switches	Ipv6
Smtp	Access Networks
Mcqs	Sonet
Ftp	Aptitude Test
Physical Layer	Telnet
Web Caching	Network Security Encryption
Quiz	Online Quiz
Online Test	Ipsecurity
Security	Ospf
Firewall	Ethernet
Wireless Lan	Network Utilities
Bluetooth	Wimax
Rtp	Rpc
Eigrp 2	Reference Models
Data Link Layer	Transport Layer
Multiplexing	Packet Circuit Switching
Delays Loss	Network Attacks
Tcp	Udp
Virtual Circuit	Congestion Control
Test	World Wide Web
Icmp	Cryptography
Ip Routing 2	Physical Media
Dns	Dhcp
Ssh	Internetworking

Which of the following is false with respect to TCP?

A. Connection-oriented
B. Process-to-process
C. Transport layer protocol
D. Unreliable

Explanation: TCP is a transport layer protocol that provides reliable and ordered delivery of a stream of bytes between hosts communicating via an IP network.

In TCP, sending and receiving data is done as _______

A. Stream of bytes
B. Sequence of characters
C. Lines of data
D. Packets

Explanation: TCP provides stream oriented delivery between hosts communicating via an IP network and there are no message boundaries. TCP can concatenate data from a number of send () commands into one stream of data and still transmit it reliably.

TCP process may not write and read data at the same speed. So we need __________ for storage.

A. Packets
B. Buffers
C. Segments
D. Stacks

Explanation: A TCP receiver has a receive buffer that is used to store the unprocessed incoming packets in case the sender is sending packets faster than the processing rate of the received packets.

TCP groups a number of bytes together into a packet called _______

A. Packet
B. Buffer
C. Segment
D. Stack

Explanation: A segment may be collection of data from many send () statements. TCP transmits each segment as a stream of bytes.

Communication offered by TCP is ________

A. Full-duplex
B. Half-duplex
C. Semi-duplex
D. Byte by byte

Explanation: Data can flow both the directions at the same time during a TCP communication hence, it is full-duplex. This is the reason why TCP is used in systems that require full-duplex operation such as e-mail systems.

To achieve reliable transport in TCP, ___________ is used to check the safe and sound arrival of data.

A. Packet
B. Buffer
C. Segment
D. Acknowledgment

Explanation: Acknowledgment mechanism is used to check the safe and sound arrival of data. The sender actively checks for acknowledgement from the receiver and once a specific time period has passed, it retransmits the data.

In segment header, sequence number and acknowledgement number fields refer to _______

A. Byte number
B. Buffer number
C. Segment number
D. Acknowledgment

Explanation: As TCP has to ensure ordered delivery of packets, sequence number and acknowledgement number are used to identify the byte number of the packet in the stream of bytes being transmitted.

Suppose a TCP connection is transferring a file of 1000 bytes. The first byte is numbered 10001. What is the sequence number of the segment if all data is sent in only one segment?

A. 10000
B. 10001
C. 12001
D. 11001

Explanation: The sequence number given to first byte of a segment, with respect to its order among the previous segments, is the sequence number of that segment.

Bytes of data being transferred in each connection are numbered by TCP. These numbers start with a _________

A. Fixed number
B. Random sequence of 0€?s and 1€?s
C. One
D. Sequence of zero’s and one’s

Explanation: One might expect the sequence number of the first byte in the stream to be 0, or 1. But that does not happen in TCP, Instead, the sender has to choose an Initial Sequence Number (ISN), which is basically a random 32 bit sequence of 0’s and 1’s, during the connection handshake.

The value of acknowledgement field in a segment defines _______

A. Sequence number of the byte received previously
B. Total number of bytes to receive
C. Sequence number of the next byte to be received
D. Sequence of zeros and ones

Explanation: The acknowledgement field in a segment defines the sequence number of the byte which is to be received next i.e. sequence number of byte that the sender should transmit next.