Computer Networks: Master the Fundamentals of Network Architecture and Protocols

Question 1

Which network topology is most commonly used in enterprise networks?

Accepted Answer

Star topology

Answer

Bus topology

Answer

Ring topology

Answer

Mesh topology

Question 2

In the OSI model, which layer is responsible for routing and addressing?

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Data link layer

Question 3

In the OSI model, which layer is responsible for routing data across a network?

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Data Link layer

Question 4

In the TCP/IP model, which layer is responsible for providing logical addressing and routing of data packets across different networks?

Accepted Answer

Internet Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Network Access Layer

Question 5

In a computer network, what is the main purpose of a firewall?

Accepted Answer

To filter and control network traffic based on security rules

Answer

To forward data packets between network devices

Answer

To provide secure remote access to authorized users

Answer

To translate data into different formats for network communication

Question 6

In the TCP/IP model, which layer is responsible for setting up and maintaining connections between devices on a network?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 7

In the TCP/IP model, which layer is responsible for routing data packets to their intended destinations based on their IP addresses?

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Data Link layer

Question 8

In the TCP/IP model, which layer ensures reliable data transmission by detecting and correcting errors, managing flow control, and establishing connections?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 9

Within the TCP/IP model, which layer is primarily tasked with establishing and maintaining connections between devices on a network?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Answer

Data Link Layer

Question 10

In the TCP/IP model, which layer ensures data is transmitted reliably?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Answer

Data Link Layer

Question 11

Which layer is NOT part of the TCP/IP model?

Accepted Answer

Physical

Answer

Application

Answer

Transport

Answer

Network

Question 12

In the TCP/IP model, which layer ensures reliable data delivery between the source and destination?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Internet

Question 13

In the TCP/IP model, which layer is tasked with directing data packets across a network?

Accepted Answer

Network Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Data Link Layer

Question 14

In the OSI model, which layer handles establishing and maintaining connections between network devices?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 15

Which layer is absent from the TCP/IP model?

Accepted Answer

Session

Answer

Application

Answer

Transport

Answer

Network

Question 16

In the OSI model, which layer ensures reliable data transfer between network endpoints?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Data Link

Question 17

In the TCP/IP network model, which layer is responsible for establishing and maintaining network connections between hosts to ensure reliable data delivery?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data link layer

Question 18

Which layer in the TCP/IP model is responsible for routing data packets across the network?

Accepted Answer

Internet layer

Answer

Physical layer

Answer

Application layer

Answer

Transport layer

Question 19

In the Open Systems Interconnection (OSI) model, which layer is responsible for ensuring reliable data transmission and establishing end-to-end connections?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Data Link

Question 20

Within the TCP/IP model, which layer is tasked with establishing and maintaining connections between hosts across different networks?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Physical

Question 21

Within the TCP/IP model, which layer is responsible for ensuring reliable data transmission through flow control and error checking?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Answer

Data Link Layer

Question 22

Within the TCP/IP model, which layer is tasked with ensuring the reliable transmission of data across a network connection?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 23

In the TCP/IP model, which layer is responsible for directing data packets efficiently across a network?

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Data Link layer

Question 24

In the OSI model, which layer is tasked with detecting and correcting errors?

Accepted Answer

Data Link Layer

Answer

Physical Layer

Answer

Network Layer

Answer

Application Layer

Question 25

In the TCP/IP model, which layer is responsible for managing the flow of data between two devices?

Accepted Answer

Transport Layer

Answer

Network Interface Layer

Answer

Application Layer

Answer

Internet Layer

Question 26

In the Open Systems Interconnection (OSI) model for computer networks, which layer is responsible for switching data packets to ensure efficient data delivery?

Accepted Answer

Data Link Layer

Answer

Application Layer

Answer

Transport Layer

Question 27

In the OSI model, which security mechanism is implemented at the Network Layer to safeguard data during transmission?

Accepted Answer

IPsec

Answer

Firewall

Answer

Encryption

Question 28

In the TCP/IP model, which layer is responsible for ensuring reliable, connection-based communication?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Question 29

In the OSI model, which layer manages the setup, upkeep, and termination of network connections?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 30

Within the TCP/IP model, which layer is accountable for ensuring reliable data transmission?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Interface Layer

Question 31

Which network topology offers enhanced reliability and fault tolerance by providing multiple redundant paths between devices?

Accepted Answer

Mesh Topology

Answer

Bus Topology

Answer

Star Topology

Answer

Ring Topology

Question 32

In the OSI model, which layer handles addressing and routing of packets?

Accepted Answer

Network Layer

Answer

Physical Layer

Answer

Data Link Layer

Answer

Transport Layer

Question 33

In the context of network management, which of the following best describes the process of monitoring and maintaining the performance and availability of network resources?

Accepted Answer

Performance monitoring and maintenance

Answer

Network optimization

Answer

Fault detection and resolution

Question 34

In a computer network, which switch operates at the data link layer of the OSI model, facilitating rapid data transfer and frame switching based on addresses?

Accepted Answer

Ethernet switch

Answer

Multilayer switch

Answer

Layer 3 switch

Answer

Virtual LAN switch

Question 35

Within the OSI model, which layer is responsible for managing and establishing connections between devices?

Accepted Answer

Transport Layer

Answer

Network Layer

Answer

Application Layer

Question 36

In computer networks, which routing algorithm is most suitable for dynamic environments where network topology and traffic patterns change frequently?

Accepted Answer

Link-State Routing

Answer

Distance Vector Routing

Answer

Path Vector Routing

Answer

Hybrid Routing

Question 37

Which of the following is a potential drawback of implementing a Network Management System (NMS)?

Accepted Answer

Increased network complexity

Answer

Centralized monitoring and control

Answer

Enhanced network performance and reliability

Answer

Improved network security

Question 38

In a computer network, which protocol is used to translate IP addresses into MAC addresses?

Accepted Answer

ARP

Answer

TCP

Answer

UDP

Answer

DNS

Question 39

In a computer network, what is the primary function of a MAC address?

Accepted Answer

Uniquely identifies a specific network interface card (NIC) on a device.

Answer

Determines the network topology and physical layout of connected devices.

Answer

Regulates data flow and prevents network congestion.

Question 40

In the OSI model, which layer handles the establishment and management of network connections?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Answer

Physical Layer

Question 41

In the OSI model, data undergoes encapsulation and decapsulation at each layer. Describe how this process functions and how it enables communication between layers.

Accepted Answer

Encapsulation adds protocol-specific headers and trailers to data at each layer, while decapsulation removes them to reveal the data to the next layer.

Answer

Encapsulation breaks data into smaller packets at each layer, while decapsulation reassembles them into a complete message.

Answer

Encapsulation encrypts data for security at each layer, while decapsulation decrypts it for readability.

Answer

Encapsulation and decapsulation do not occur in the OSI model, as each layer operates independently.

Question 42

What is the primary function of a firewall in computer networks?

Accepted Answer

Blocking unauthorized network access

Answer

Enhancing network performance

Answer

Translating network addresses

Answer

Storing network configuration

Question 43

Explain the distinction between a static and a dynamic IP address.

Accepted Answer

Static addresses are permanent, while dynamic addresses change over time.

Answer

Dynamic addresses are permanent, while static addresses change over time.

Answer

There is no difference between static and dynamic IP addresses.

Answer

Static addresses are used for servers, while dynamic addresses are used for clients.

Question 44

What is the primary purpose of a network management system (NMS)?

Accepted Answer

Monitoring and managing network elements

Answer

Providing network security

Answer

Connecting devices to the network

Answer

Translating network addresses

Question 45

What is the primary advantage of using a virtual private network (VPN)?

Accepted Answer

Providing secure and encrypted communication over public networks

Answer

Improving network performance

Answer

Reducing network costs

Answer

Simplifying network management

Question 46

Which OSI model layer is responsible for managing communication sessions between hosts, including establishing, maintaining, and terminating them?

Accepted Answer

Session Layer

Answer

Application Layer

Answer

Presentation Layer

Answer

Transport Layer

Question 47

Design a network architecture for a university campus that provides optimal connectivity, security, and scalability for students and staff. Which of the following network architectures would be most suitable?

Accepted Answer

A hierarchical network with multiple layers of switches and routers

Answer

A flat network with a single central router

Answer

A mesh network with each device connected to multiple other devices

Question 48

At which layer in the OSI model does routing take place?

Accepted Answer

Network Layer

Answer

Physical Layer

Answer

Data Link Layer

Answer

Transport Layer

Question 49

Which is the primary function of a TCP header?

Accepted Answer

Establishing connections and maintaining them.

Answer

Routing packets across networks.

Answer

Providing data integrity and retransmission.

Answer

Fragmenting data into smaller packets.

Question 50

Which of these is NOT a common type of network topology?

Accepted Answer

Hierarchical

Answer

Bus

Answer

Star

Answer

Ring

Question 51

What is the main purpose of using a subnet mask?

Accepted Answer

Identifying network and host portions of an IP address.

Answer

Directing packets between subnets.

Answer

Preventing unauthorized access to a network.

Answer

Translating domain names into IP addresses.

Question 52

What is the primary purpose of a MAC address?

Accepted Answer

Identifying individual devices on a network.

Answer

Routing traffic between different subnets.

Answer

Providing encryption for data transmission.

Answer

Storing user credentials for network access.

Question 53

Which characteristic is unique to wireless networks?

Accepted Answer

Using radio waves for data transmission.

Answer

Requiring physical cables to connect devices.

Answer

Offering higher bandwidth than wired networks.

Answer

Being immune to interference from external sources.

Question 54

What is the key function of a DNS server?

Accepted Answer

Converting domain names into their corresponding IP addresses.

Answer

Routing packets across the internet.

Answer

Filtering malicious traffic and preventing cyber threats.

Answer

Storing and managing files for network users.

Question 55

What is the primary role of a network switch?

Accepted Answer

Connecting multiple devices within a network segment.

Answer

Directing traffic between different networks.

Answer

Providing network security by blocking unauthorized access.

Answer

Storing data and files for network users.

Question 56

What is the purpose of a subnet mask?

Accepted Answer

To identify the network portion of an IP address

Answer

To define the broadcast address for a network

Answer

To prevent unauthorized access to a network

Answer

To improve network performance by reducing broadcast traffic

Question 57

Which OSI layer is responsible for transmitting data over physical media?

Accepted Answer

Physical layer

Answer

Data link layer

Answer

Network layer

Answer

Transport layer

Question 58

What is the primary function of a proxy server?

Accepted Answer

To cache frequently requested web pages and reduce network traffic

Answer

To provide network security by filtering incoming and outgoing traffic

Answer

To translate protocols between different networks

Answer

To route traffic efficiently through a firewall

Question 59

What is the primary purpose of a firewall?

Accepted Answer

To prevent unauthorized access to a network by filtering incoming and outgoing traffic

Answer

To detect and block malicious traffic such as viruses and worms

Answer

To provide a secure connection between two networks

Answer

To optimize network performance by reducing unnecessary traffic

Question 60

Within the TCP/IP model, which layer is responsible for routing traffic?

Accepted Answer

Internet Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Network Access Layer

Question 61

What type of IP address is used for communication within a local network?

Accepted Answer

Private IP address

Answer

Public IP address

Answer

Loopback IP address

Answer

Broadcast IP address

Question 62

What is the main function of a firewall in a network?

Accepted Answer

To control inbound and outbound network traffic

Answer

To detect and prevent intrusion attempts

Answer

To provide anonymity for users

Answer

To optimize network performance

Question 63

What is the key difference between TCP and UDP?

Accepted Answer

TCP is connection-oriented, while UDP is connectionless

Answer

UDP provides guaranteed delivery, while TCP does not

Answer

TCP is more efficient than UDP

Answer

UDP is more secure than TCP

Question 64

In the TCP/IP model, which layer is responsible for routing packets based on their destination addresses?

Accepted Answer

Network Layer

Answer

Application Layer

Answer

Data Link Layer

Answer

Transport Layer