Computer Networks MCQs 2026

A modem is used to

1. A Store data ✓
2. B Print documents ✓
3. C Cool the CPU ✓
4. D Convert digital signals to analog and vice versa ✓

NIC stands for

1. A Network Interface Card ✓
2. B Network Internet Connection ✓
3. C Node Interface Channel ✓
4. D New Interface Card ✓

A device that amplifies or regenerates a weak signal is a

1. A Router ✓
2. B Gateway ✓
3. C Repeater ✓
4. D Switch ✓

A device that connects LAN devices and forwards data only to the intended device is a

1. A Hub ✓
2. B Switch ✓
3. C Repeater ✓
4. D Modem ✓

A device that simply broadcasts incoming data to all its ports is a

1. A Router ✓
2. B Switch ✓
3. C Bridge ✓
4. D Hub ✓

A device that connects two different networks and routes data between them is a

1. A Router ✓
2. B Hub ✓
3. C Repeater ✓
4. D NIC ✓

In which topology is every device connected to every other device

1. A Star ✓
2. B Bus ✓
3. C Mesh ✓
4. D Ring ✓

In which topology are all devices connected to a central hub or switch

1. A Bus ✓
2. B Ring ✓
3. C Mesh ✓
4. D Star ✓

The physical or logical arrangement of a network is called its

1. A Topology ✓
2. B Protocol ✓
3. C Bandwidth ✓
4. D Gateway ✓

A network that covers a city is called a

1. A LAN ✓
2. B WAN ✓
3. C MAN ✓
4. D PAN ✓

Which network covers the smallest geographical area

1. A WAN ✓
2. B MAN ✓
3. C Internet ✓
4. D LAN ✓

The Internet is an example of a

1. A LAN ✓
2. B WAN ✓
3. C PAN ✓
4. D MAN ✓

WAN stands for

1. A Wide Area Network ✓
2. B Wireless Access Node ✓
3. C Web Area Network ✓
4. D Wide Access Network ✓

LAN stands for

1. A Large Area Network ✓
2. B Local Access Node ✓
3. C Local Area Network ✓
4. D Linked Area Network ✓

In which topology do all devices share a single backbone cable

1. A Star ✓
2. B Bus ✓
3. C Ring ✓
4. D Mesh ✓

Which protocol is used to transfer files between computers

1. A FTP ✓
2. B HTTP ✓
3. C SMTP ✓
4. D DNS ✓

Which protocol is used to send emails

1. A HTTP ✓
2. B FTP ✓
3. C POP3 ✓
4. D SMTP ✓

Which system translates domain names into IP addresses

1. A DHCP ✓
2. B DNS ✓
3. C FTP ✓
4. D SMTP ✓

Which protocol automatically assigns IP addresses to devices

1. A DHCP ✓
2. B DNS ✓
3. C HTTP ✓
4. D SMTP ✓

Which transmission medium offers the highest speed and bandwidth

1. A Twisted pair ✓
2. B Coaxial cable ✓
3. C Fiber optic ✓
4. D Telephone wire ✓

Fiber optic cables transmit data in the form of

1. A Electricity ✓
2. B Sound ✓
3. C Radio waves ✓
4. D Light ✓

The amount of data that can be transmitted in a given time is called

1. A Latency ✓
2. B Bandwidth ✓
3. C Frequency ✓
4. D Topology ✓

In simplex transmission, data flows

1. A In one direction only ✓
2. B In both directions at once ✓
3. C In both directions but one at a time ✓
4. D Randomly ✓

Which protocol is used to transfer web pages

1. A FTP ✓
2. B SMTP ✓
3. C HTTP ✓
4. D DHCP ✓

Which is the lowest (first) layer of the OSI model

1. A Network ✓
2. B Physical ✓
3. C Transport ✓
4. D Application ✓

How many layers does the OSI model have

1. A 4 ✓
2. B 5 ✓
3. C 6 ✓
4. D 7 ✓

A MAC address is also known as the

1. A Physical hardware address ✓
2. B Logical address ✓
3. C Domain address ✓
4. D Port address ✓

An IPv6 address is how many bits long

1. A 32 bits ✓
2. B 64 bits ✓
3. C 128 bits ✓
4. D 256 bits ✓

An IPv4 address is how many bits long

1. A 16 bits ✓
2. B 32 bits ✓
3. C 64 bits ✓
4. D 128 bits ✓

The largest wide area network in the world is the

1. A Intranet ✓
2. B Extranet ✓
3. C Ethernet ✓
4. D Internet ✓

A bridge is used to

1. A Route between the internet and a LAN ✓
2. B Connect and filter traffic between two LAN segments ✓
3. C Amplify signals ✓
4. D Assign IP addresses ✓

POP3 and IMAP protocols are used to

1. A Send emails ✓
2. B Transfer files ✓
3. C Browse websites ✓
4. D Receive and retrieve emails ✓

The failure of the central device brings down the whole network in which topology

1. A Bus ✓
2. B Ring ✓
3. C Star ✓
4. D Mesh ✓

Which of the following is a network layer device

1. A Router ✓
2. B Hub ✓
3. C Repeater ✓
4. D Cable ✓

A company that provides internet access to customers is called an

1. A Web host ✓
2. B ISP ✓
3. C DNS server ✓
4. D Gateway ✓

In a client-server network, the computer that provides services is the

1. A Server ✓
2. B Client ✓
3. C Router ✓
4. D Node ✓

Which device connects networks that use different protocols

1. A Hub ✓
2. B Repeater ✓
3. C Gateway ✓
4. D Switch ✓

A private network used within an organization is called a/an

1. A Internet ✓
2. B Extranet ✓
3. C ISP ✓
4. D Intranet ✓

Ethernet is a technology mainly used in

1. A WANs ✓
2. B LANs ✓
3. C Satellites ✓
4. D Telephone networks ✓

In full-duplex transmission, data flows

1. A In one direction ✓
2. B In no direction ✓
3. C In both directions simultaneously ✓
4. D Only when idle ✓

A walkie-talkie is an example of which transmission mode

1. A Simplex ✓
2. B Full-duplex ✓
3. C Broadcast ✓
4. D Half-duplex ✓

Which wireless technology is used for short-range connections between devices

1. A Wi-Fi ✓
2. B Bluetooth ✓
3. C Ethernet ✓
4. D Fiber ✓

Wi-Fi is used to create a wireless

1. A LAN ✓
2. B WAN only ✓
3. C MAN only ✓
4. D PAN only ✓

A set of rules that governs data communication is called a

1. A Topology ✓
2. B Gateway ✓
3. C Protocol ✓
4. D Bandwidth ✓

TCP/IP is a

1. A Single protocol ✓
2. B Cable type ✓
3. C Topology ✓
4. D Suite of protocols ✓