1. The speed of data transfer is measured in:
A) Byte
B) Hertz
C) Bits per second
D) Pixel
Answer: C) Bits per second
A computer network is a system in which multiple computers are connected to share:
A) Software
B) Resources and data
C) Only hardware
D) Only internet
Answer: B) Resources and data
Which device connects multiple computers within a LAN?
A) Router
B) Switch
C) Modem
D) Firewall
Answer: B) Switch
The full form of LAN is:
A) Local Area Network
B) Large Area Network
C) Logical Area Network
D) Line Area Network
Answer: A) Local Area Network
A WAN covers:
A) Small office
B) Large geographical area
C) Single building
D) Personal computer
Answer: B) Large geographical area
Which topology uses a single central cable?
A) Star
B) Bus
C) Ring
D) Mesh
Answer: B) Bus
In star topology all devices connect to:
A) Switch/Hub
B) Cable
C) Router only
D) Server only
Answer: A) Switch/Hub
Which topology forms a closed loop?
A) Ring
B) Bus
C) Tree
D) Star
Answer: A) Ring
The device used to connect two different networks is:
A) Hub
B) Router
C) Repeater
D) Bridge
Answer: B) Router
Which layer of the OSI model deals with routing?
A) Network Layer
B) Physical Layer
C) Session Layer
D) Presentation Layer
Answer: A) Network Layer
The OSI model consists of how many layers?
A) 5
B) 6
C) 7
D) 8
Answer: C) 7
Which layer is responsible for data encryption?
A) Transport
B) Presentation
C) Network
D) Session
Answer: B) Presentation
TCP/IP model mainly has how many layers?
A) 4
B) 5
C) 6
D) 7
Answer: A) 4
Which protocol is used for transferring web pages?
A) FTP
B) HTTP
C) SMTP
D) SNMP
Answer: B) HTTP
FTP stands for:
A) File Transfer Protocol
B) Fast Transfer Protocol
C) File Transport Program
D) Fast Transport Program
Answer: A) File Transfer Protocol
SMTP is used for:
A) Sending email
B) Receiving email
C) File transfer
D) Browsing
Answer: A) Sending email
POP3 is used for:
A) Sending mail
B) Receiving email
C) Web browsing
D) File transfer
Answer: B) Receiving email
IP stands for:
A) Internet Process
B) Internet Protocol
C) Internal Protocol
D) Internet Program
Answer: B) Internet Protocol
IPv4 address length is:
A) 16 bits
B) 32 bits
C) 64 bits
D) 128 bits
Answer: B) 32 bits
IPv6 address length is:
A) 32 bits
B) 64 bits
C) 128 bits
D) 256 bits
Answer: C) 128 bits
Which device amplifies signals in a network?
A) Router
B) Repeater
C) Switch
D) Bridge
Answer: B) Repeater
A hub operates at which OSI layer?
A) Physical Layer
B) Data Link Layer
C) Network Layer
D) Transport Layer
Answer: A) Physical Layer
Which device filters data using MAC addresses?
A) Router
B) Bridge
C) Repeater
D) Modem
Answer: B) Bridge
MAC address stands for:
A) Media Access Control
B) Machine Access Code
C) Main Access Control
D) Memory Access Code
Answer: A) Media Access Control
Which protocol automatically assigns IP addresses?
A) DNS
B) DHCP
C) FTP
D) SNMP
Answer: B) DHCP
DNS converts:
A) IP to MAC
B) Domain name to IP address
C) Data to signal
D) Signal to data
Answer: B) Domain name to IP address
The physical layout of a network is called:
A) Protocol
B) Topology
C) Transmission
D) Architecture
Answer: B) Topology
Which topology provides highest reliability?
A) Bus
B) Ring
C) Mesh
D) Star
Answer: C) Mesh
In which topology does each node connect to every other node?
A) Star
B) Mesh
C) Bus
D) Tree
Answer: B) Mesh
A network covering a city is called:
A) LAN
B) MAN
C) PAN
D) WAN
Answer: B) MAN
PAN stands for:
A) Personal Area Network
B) Private Area Network
C) Public Area Network
D) Peripheral Area Network
Answer: A) Personal Area Network
Which device connects a network to the internet?
A) Router
B) Switch
C) Hub
D) Repeater
Answer: A) Router
HTTP normally uses port number:
A) 21
B) 25
C) 80
D) 110
Answer: C) 80
HTTPS uses port:
A) 21
B) 443
C) 110
D) 23
Answer: B) 443
FTP default port is:
A) 21
B) 22
C) 23
D) 25
Answer: A) 21
Telnet works on port:
A) 20
B) 23
C) 25
D) 80
Answer: B) 23
Which layer is responsible for reliable delivery?
A) Transport Layer
B) Network Layer
C) Physical Layer
D) Application Layer
Answer: A) Transport Layer
TCP stands for:
A) Transfer Control Protocol
B) Transmission Control Protocol
C) Transport Communication Protocol
D) Transmission Communication Process
Answer: B) Transmission Control Protocol
UDP stands for:
A) User Datagram Protocol
B) Universal Data Protocol
C) User Data Process
D) Unified Data Program
Answer: A) User Datagram Protocol
Which protocol is connectionless?
A) TCP
B) UDP
C) FTP
D) SMTP
Answer: B) UDP
Which layer transmits raw bits over the medium?
A) Physical Layer
B) Network Layer
C) Session Layer
D) Application Layer
Answer: A) Physical Layer
The layer responsible for establishing sessions is:
A) Session Layer
B) Network Layer
C) Physical Layer
D) Transport Layer
Answer: A) Session Layer
Which layer ensures data formatting?
A) Presentation Layer
B) Network Layer
C) Physical Layer
D) Session Layer
Answer: A) Presentation Layer
The Application layer provides services for:
A) End users
B) Network devices
C) Hardware
D) Signals
Answer: A) End users
Which network type is used in homes for small distances?
A) PAN
B) LAN
C) WAN
D) MAN
Answer: B) LAN
The backbone of the internet is:
A) LAN
B) WAN
C) MAN
D) PAN
Answer: B) WAN
Which device modulates and demodulates signals?
A) Router
B) Modem
C) Hub
D) Switch
Answer: B) Modem
A firewall is used for:
A) Security
B) Printing
C) File transfer
D) Video streaming
Answer: A) Security
Packet switching is used in:
A) Internet
B) Telephone lines
C) Radio
D) Television
Answer: A) Internet
Data in a network is divided into small units called:
A) Frames
B) Packets
C) Blocks
D) Signals
Answer: B) Packets