1 What is a protocol in computer networking? A A set of rules for communication B A type of cable C A hardware device D A software application
2 Which network topology connects all devices to a central device? A Bus topology B Star topology C Ring topology D Mesh topology
3 Which device is used to connect multiple devices in a star topology? A Switch B Router C Modem D Repeater
4 In which transmission mode can data flow in both directions but only one direction at a time? A Simplex B Half-duplex C Full-duplex D Multiplex
5 In which transmission mode can data flow in only one direction at a time? A Simplex B Half-Duplex C Full-Duplex D Duplex
6 Which device is used to connect multiple devices to a network and forward data packets between them? A Router B Switch C Access point D Repeater
7 Which network security method uses a barrier to control incoming and outgoing traffic? A Encryption B Antivirus Software C Firewall D Password
9 Which of the following is an example of network security method? A Using a switch B Encryption C Using a hub D Using a repeater
10 Which layer of the OSI model is responsible for routing packets between networks? A Physical layer B Data link layer C Network layer D Transport layer
11 What is the main function of a firewall in network security? A To speed up the network B To block unauthorized access C To store data backups D To assign IP addresses
12 Which OSI layer is responsible for error-free delivery of data frames between nodes? A Physical layer B Data link layer C Network layer D Transport layer
13 Which device is used to connect a wireless device to a wired network? A Switch B Router C Access Point D Modem
14 At which OSI layer is data encapsulated into frames? A Physical Layer B Data Link Layer C Network Layer D Transport Layer
15 Which of the following is a characteristic of IPv4 addresses? A 32-bit length B 128-bit length C 64-bit length D 16-bit length
16 What is the primary purpose of a firewall in network security? A To speed up the network B To control incoming and outgoing traffic C To store data backups D To assign IP addresses
17 Which component of data communication is responsible for converting data into signals? A Sender B Receiver C Transmission medium D Protocol
18 In which transmission mode can data flow in both directions but only one at a time? A Simplex B Half-duplex C Full-duplex D Broadcast
19 Which of the following is a real-world application of computer networks in healthcare? A Online banking B Telemedicine C Online shopping D Video streaming
20 Which device is used to connect different networks and choose the best path for data? A Switch B Router C Access Point D Repeater
21 What does IP stand for in the context of computer networks? A Internet Provider B Internal Protocol C Internet Protocol D Information Protocol
24 What is the main function of a router? A To connect devices within a LAN B To forward data packets between different networks C To amplify signals in a cable D To provide wireless access to devices
25 What is a set of rules that governs data communication called? A Protocol B Topology C Medium D Network