Computer Knowledge
Computer Networks
2,614 Questions
Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.
OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands
Computer Networks Questions
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HTTP
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SMTP
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NNTP
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DNS
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TELNET
D
Correct answer
Explanation
DNS primarily uses User Datagram Protocol (UDP) on port number 53 to serve requests.
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PURE ALOHA
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SLOTTED ALOHA
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1-persistent CSMA
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Non-persistent CSMA
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Bit Map Protocol
E
Correct answer
Explanation
Bit Map Protocol is also a contention system. In Bit Map Protocol, the desire to transmit is broadcast before the actual transmission. Such protocols are called reservation protocols.
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Internet Header Length (IHL)
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Differentiated Services Code Point (DSCP)
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Explicit Congestion Notification (ECN)
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Time To Live (TTL)
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Protocol
D
Correct answer
Explanation
Time to live (TTL) or hop limit is a mechanism that limits the lifespan or lifetime of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data. Once the prescribed event count or timespan has elapsed, data is discarded.
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CONNECT
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DISCONNECT
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RESET
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DATA
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REPORT
E
Correct answer
Explanation
This network layer is primitive for Connection Less Service. It is used for enquiring into the performance of the network.
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Remote Procedure Call
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Random Procedure Call
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Random Protocol Connection
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None of these
A
Correct answer
Explanation
RPC (Remote Procedure Call) is a protocol that allows a program to execute a procedure or function on another computer (remote server) as if it were a local call. The programmer doesn't need to explicitly code the details of network communication - the RPC mechanism handles the transparent communication between local and remote systems.
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Network layer
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Transport layer
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Application layer
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Session layer
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Physical layer
C
Correct answer
Explanation
This layer in OSI interfaces directly to the users and performs common application services for the application processes.
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1.441/4511
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1.515
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Q.700
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Q.931
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V.120
C
Correct answer
Explanation
This ISDN standard is used for signalling system number specifications in networking.
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Flags
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Identification
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Fragmentation offset
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TTL
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Protocols
D
Correct answer
Explanation
This component of IPv4 packet header is of 1 byte size and is used for specifying the maximum time interval during which the packet can travel across the network.
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Data link level
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Physical level
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Packet level
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Network level
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Application level
A
Correct answer
Explanation
This level in X.25 network provides reliable transfer of data across the physical link.
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Header
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Data
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Version
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TOS
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Fragmentation offset
A
Correct answer
Explanation
This part of IPv4 protocol has a 20 byte fixed part.
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Checksum
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Acknowledgement
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Retransmission
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TCP error control
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Flags
D
Correct answer
Explanation
This mechanism in TCP/IP deals with detecting corrupted segments, lost segments, out-of-order segments and duplicated segments.
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Peak cell rate
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Acknowledgement
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Sustained cell rate
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TCP error control
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Flags
A
Correct answer
Explanation
This term specifies the maximum amount of traffic that can be submitted by a source to an ATM network.
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Session layer
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Presentation layer
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Application layer
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Transport layer
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Network layer
C
Correct answer
Explanation
This layer of OSI contains a variety of protocols that are commonly needed by the user.
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IDRP
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BGP
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HTTP
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URL
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Multicast routing
B
Correct answer
Explanation
This protocol is an exterior gateway protocol that carries out routing between multiple autonomous systems or domains.
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HTTP
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FTP
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SLIP/PPP
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POP
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SMTP
C
Correct answer
Explanation
This protocol was the first protocol for relaying the IP packets over dial-up lines.