1. What is the main difference between serial and parallel transmission?
a) Serial transmission transmits data one bit at a time, while parallel transmission transmits multiple bits simultaneously.
b) Serial transmission is faster than parallel transmission.
c) Parallel transmission is used only in wireless communication.
d) Serial transmission is used for analog data, while parallel transmission is used for digital data.
Answer: a) Serial transmission transmits data one bit at a time, while parallel transmission transmits multiple bits simultaneously.
Explanation: Serial transmission sends data sequentially, bit by bit, over a single channel, while parallel transmission sends multiple bits simultaneously over multiple channels.
2. Which of the following is an example of a line encoding scheme?
a) HTML
b) ASCII
c) Unipolar
d) FTP
Answer: c) Unipolar
Explanation: Line encoding schemes like unipolar, polar, and bipolar are methods used to represent binary data on a communication channel.
3. Which organization is responsible for setting international standards for networking?
a) IEEE
b) NASA
c) NSA
d) ISO
Answer: d) ISO
Explanation: The International Organization for Standardization (ISO) is responsible for setting international standards, including those related to networking.
4. What does the term “topology” refer to in networking?
a) The arrangement of physical devices and connections in a network.
b) The speed of data transmission.
c) The type of cables used in a network.
d) The software used to manage network operations.
Answer: a) The arrangement of physical devices and connections in a network.
Explanation: Topology in networking refers to how devices are interconnected in a network, such as in a star, bus, or ring topology.
5. Which transmission mode allows for bidirectional communication but not simultaneously?
a) Simplex
b) Half-duplex
c) Full-duplex
d) Multiplex
Answer: b) Half-duplex
Explanation: In half-duplex mode, data can be transmitted in both directions, but not simultaneously. This is commonly seen in walkie-talkies.
6. Which of the following is an example of a bipolar line encoding scheme?
a) Manchester encoding
b) NRZ-L encoding
c) Unipolar encoding
d) AMI encoding
Answer: d) AMI encoding
Explanation: Alternate Mark Inversion (AMI) is a bipolar line encoding scheme where successive 1s have alternating polarity.
7. What is the primary function of network protocols?
a) To set up physical connections between devices.
b) To transmit data over the network.
c) To provide encryption for data.
d) To manage network hardware.
Answer: b) To transmit data over the network.
Explanation: Network protocols define rules and conventions for communication between devices on a network, including how data is transmitted.
8. Which type of network configuration connects all devices to a central hub?
a) Bus
b) Star
c) Ring
d) Mesh
Answer: b) Star
Explanation: In a star network configuration, all devices are connected to a central hub, which facilitates communication between them.
9. Which transmission mode allows for simultaneous bidirectional communication?
a) Simplex
b) Half-duplex
c) Full-duplex
d) Multiplex
Answer: c) Full-duplex
Explanation: Full-duplex mode allows for simultaneous bidirectional communication, meaning data can be transmitted in both directions simultaneously.
10. What is the purpose of an inter-network?
a) To connect devices within a single network.
b) To facilitate communication between networks.
c) To encrypt data transmission.
d) To manage network security.
Answer: b) To facilitate communication between networks.
Explanation: An inter-network, commonly referred to as the internet, connects multiple networks together, enabling communication between devices on different networks.