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GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Networks → Introduction to Computer Networks 7

User datagram protocol is called connectionless because
all UDP packets are treated independently by transport layer
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Third generation of firewall offers _ to prevent web application attacks
web application firewall
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The identity management system binds logical address with
specific programs
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IPS in firewall stands for
intrusion prevention system
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Third generation firewalls were otherwise called
application filters
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Encapsulation refers to
Adding headers/trailers at each layer
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SAP stands for in OSI context
Service Access Point
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Computer Networks → Types of Networks 6

Transmission control protocol is
all of the above
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LAN stands for
Local Area Network
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MAN stands for
Metropolitan Area Network
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WAN stands for
Wide Area Network
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PAN stands for
Personal Area Network
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Typical geographic range of MAN is
5-50 km
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Computer Networks → Network Topologies 1

An endpoint of an inter-process communication flow across a computer network is called
socket
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Computer Networks → OSI Reference Model 8

Transport layer aggregates data from different applications into a single stream before passing it to
network layer
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OSI model was developed by which organization
ISO
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Which OSI layer is responsible for routing
Network
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Which OSI layer handles encryption and decryption
Presentation
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TCP/IP Application layer corresponds to OSI layers
5 6 7
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TCP/IP Internet layer corresponds to OSI layer
3
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Which OSI layer provides user interface to network
Application
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TCP/IP Network Access layer corresponds to OSI layers
1 and 2
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Computer Networks → TCP/IP Model 2

The ASCII encoding of binary data is called
base 64 encoding
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The TCP/IP model has how many layers
4
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Computer Networks → Physical Layer 3

A high speed communication equipment typically would not be needed for
E-mail
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The physical layer of OSI deals with
Bit transmission over medium
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PDU at the Physical layer is called
Bit
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Computer Networks → Data Link Layer 2

What is Unicode?
Represents symbol or characters used in any langua
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PDU at the Data Link layer is called
Frame
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Computer Networks → Network Layer 2

In OSI model dialogue control and token management are responsibilities of ?
Session Layer
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PDU at the Network layer is called
Packet
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Computer Networks → Transport Layer 2

An asymmetric-key (or public-key) cipher uses
2 Key
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PDU at the Transport layer is called
Segment
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Computer Networks → Session Layer 2

A straight permutation cipher or a straight P-box has same number of inputs as
Outputs
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Session layer in OSI is responsible for
Establishing maintaining terminating sessions
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Computer Networks → Presentation Layer 1

Man-in-the-middle attack can endanger security of Diffie-Hellman method if two parties are not
Authenticated
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Computer Networks → Application Layer 1

We use Cryptography term to transforming messages to make them secure and immune to
Attacks
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Computer Networks → IP Addressing 1

Shift cipher is sometimes referred to as the
Caesar cipher
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Computer Networks → Subnetting 1

Substitutional cipers are
both a and c
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Computer Networks → Routing Algorithms 1

Heart of Data Encryption Standard (DES), is the
DES function
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