Computer Networks: Master the Fundamentals of Networking

Question 1

In the TCP/IP protocol suite, which layer handles services for user applications like web browsing and email?

Accepted Answer

Application

Answer

Transport

Answer

Network

Answer

Data Link

Question 2

In the TCP/IP protocol suite, what is the main role of the transport layer?

Accepted Answer

Ensuring reliable data transmission and flow control

Answer

Sending data in packets

Answer

Breaking data into smaller packets

Answer

Assigning IP addresses to devices

Question 3

In a star network topology, how are the devices connected?

Accepted Answer

To a central hub

Answer

To each other

Answer

In a circular fashion

Answer

To a single cable

Question 4

Which layer is NOT included in the OSI model?

Accepted Answer

Encryption

Answer

Application

Answer

Transport

Answer

Physical

Question 5

Within the TCP/IP protocol suite, which layer manages the establishment, maintenance, and termination of connections between devices?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Data Link

Question 6

Which layer is **excluded** from the TCP/IP protocol suite?

Accepted Answer

Data Link

Answer

Application

Answer

Transport

Answer

Network

Question 7

In the OSI model, which protocol operates at layer 3, enabling communication between different networks?

Accepted Answer

Internet Protocol (IP)

Answer

Transmission Control Protocol (TCP)

Answer

Hypertext Transfer Protocol (HTTP)

Answer

Ethernet

Question 8

Within the OSI model, which layer is tasked with ensuring reliable and error-free data transmission?

Accepted Answer

Transport Layer

Answer

Physical Layer

Answer

Data Link Layer

Answer

Network Layer

Question 9

Within the TCP/IP protocol suite, which protocol ensures reliable, connection-based data transmission over a network?

Accepted Answer

TCP

Answer

HTTP

Answer

UDP

Answer

IP

Question 10

In a network, which device is responsible for directing data packets to their destination along the most efficient path?

Accepted Answer

Router

Answer

Switch

Answer

Bridge

Answer

Gateway

Question 11

Within the OSI model, which layer is responsible for routing and switching data packets?

Accepted Answer

Network Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Data Link Layer

Question 12

In which network topology does a central device connect all other devices?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 13

What is the main purpose of a subnet mask?

Accepted Answer

Dividing a network into smaller subnetworks

Answer

Fixing errors in data transmission

Answer

Converting domain names to IP addresses

Answer

Encrypting data for secure transmission

Question 14

In the TCP/IP protocol suite, which layer manages connections between computers?

Accepted Answer

Transport

Answer

Application

Answer

Network

Answer

Data Link

Question 15

Which layer in the TCP/IP protocol suite is responsible for transmitting data over a physical network?

Accepted Answer

Data Link

Answer

Application

Answer

Transport

Answer

Network

Question 16

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

Accepted Answer

Session

Answer

Application

Answer

Transport

Answer

Network

Question 17

In the TCP/IP model, which layer is responsible for addressing and routing data packets across the network?

Accepted Answer

Network Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Data Link Layer

Question 18

In a hierarchical network design, which of the following is a disadvantage?

Accepted Answer

Increased network complexity

Answer

Enhanced security

Answer

Increased scalability

Answer

Improved network performance

Question 19

In the TCP/IP model, which layer is responsible for ensuring reliable data transmission?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Question 20

In the TCP/IP protocol suite, which layer handles reliable connections and data delivery between hosts?

Accepted Answer

Transport Layer

Answer

Network Access Layer

Answer

Application Layer

Question 21

Which OSI layer ensures reliable data transfer between endpoints?

Accepted Answer

Transport

Answer

Network

Answer

Session

Answer

Presentation

Question 22

In the Open Systems Interconnection (OSI) model, which layer is tasked with ensuring that data packets reach their intended destination, irrespective of the physical path taken?

Accepted Answer

Network layer

Answer

Physical layer

Answer

Data link layer

Answer

Transport layer

Question 23

Which layer is NOT included in the OSI model?

Accepted Answer

Session

Answer

Physical

Answer

Application

Answer

Transport

Question 24

In cloud computing, what key feature sets it apart from traditional computing models by enabling users to access resources as required, without the limitations of physical infrastructure?

Accepted Answer

On-demand access to computing resources

Answer

Tightly integrated hardware and software resources

Answer

Limited scalability and flexibility

Answer

Ownership and management of physical infrastructure

Question 25

Within the OSI model, which layer is responsible for routing data packets across various networks, ensuring their successful delivery to the intended destination?

Accepted Answer

Network Layer

Answer

Physical Layer

Answer

Data Link Layer

Answer

Transport Layer

Question 26

In which network topology do all devices connect to a central hub?

Accepted Answer

Star topology

Answer

Bus topology

Answer

Ring topology

Answer

Mesh topology

Question 27

In the TCP/IP protocol stack, which layer is tasked with setting up and maintaining network connections between devices?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Question 28

Within the TCP/IP protocol suite, which layer is responsible for directing packets across a network based on their destination IP address?

Accepted Answer

Network Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Data Link Layer

Question 29

Within the Open Systems Interconnection (OSI) model, which layer is responsible for ensuring reliable and connection-oriented data transmission?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data Link layer

Question 30

Within the OSI model, which layer is responsible for ensuring reliable data delivery, including error checking and flow control?

Accepted Answer

Transport layer

Answer

Application layer

Answer

Network layer

Answer

Data link layer

Question 31

In the OSI model, which layer is responsible for transmitting and receiving raw data bits over a physical medium?

Accepted Answer

Physical

Answer

Network

Answer

Application

Answer

Presentation

Question 32

In the OSI model, which layer ensures reliable data transmission across a network?

Accepted Answer

Transport layer

Answer

Physical layer

Answer

Data link layer

Answer

Application layer

Question 33

Within the Open Systems Interconnection (OSI) model, which layer is responsible for managing the physical connection and data transmission over a network medium?

Accepted Answer

Physical Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Network Layer

Question 34

Which layer is NOT part of the TCP/IP protocol suite?

Accepted Answer

Physical

Answer

Application

Answer

Transport

Answer

Network

Question 35

In Software-Defined Networking (SDN), which plane centralizes control of the network infrastructure?

Accepted Answer

Control Plane

Answer

Data Plane

Answer

Management Plane

Question 36

In the TCP/IP model, which layer is responsible for establishing and ending network connections between devices?

Accepted Answer

Transport Layer

Answer

Application Layer

Answer

Network Layer

Answer

Data Link Layer

Question 37

In a large enterprise network with multiple subnets and interconnected routers, which technique is most effective for optimizing network performance?

Accepted Answer

Implement a hierarchical routing protocol

Answer

Increase the bandwidth of all network links

Answer

Disable all unnecessary network services

Answer

Use a single, flat network topology

Question 38

Which of the following is **NOT** a recent advancement in networking?

Accepted Answer

Legacy routing protocols

Answer

Software-Defined Networking (SDN)

Answer

Network Function Virtualization (NFV)

Answer

Edge Computing

Question 39

What is a potential drawback of utilizing virtual LANs (VLANs)?

Accepted Answer

Increased network complexity

Answer

Enhanced network security

Answer

Increased network flexibility

Answer

Reduced network costs

Question 40

Network traffic monitoring shows an unusually high number of SYN packets being sent to a web server. What is the most likely cause?

Accepted Answer

B. Denial of Service (DoS) attack

Answer

A. Normal server operation

Answer

C. Network congestion

Answer

D. Server misconfiguration

Question 41

In a computer network, firewalls are essential for maintaining security. Which of the following statements about firewall rules is accurate?

Accepted Answer

Firewall rules can be used to create exceptions to the default firewall policy.

Answer

Firewall rules are always set to allow all incoming traffic.

Answer

Firewall rules are only applied to outgoing traffic.

Answer

Firewall rules cannot be modified once they are created.

Question 42

In the OSI model, which layer is responsible for framing and transmitting data over the physical network?

Accepted Answer

Network Interface Layer

Answer

Network Layer

Answer

Transport Layer

Answer

Application Layer

Question 43

What is network virtualization and how does it enhance network management, flexibility, and resource utilization?

Accepted Answer

Network virtualization enables multiple virtual networks to run on a single physical network, offering greater flexibility and resource utilization.

Answer

Network virtualization requires additional hardware and software, making it more expensive and complex to implement.

Answer

Network virtualization is only suitable for small networks and does not scale well to larger networks.

Answer

Network virtualization eliminates the need for physical network devices like routers and switches.

Question 44

Network security is crucial for safeguarding networks from cyber threats. Explain the key principles of network security and discuss the roles of firewalls, intrusion detection systems, and encryption in protecting networks.

Accepted Answer

Encryption protects data from unauthorized access, while firewalls and intrusion detection systems monitor and block malicious traffic.

Answer

Network security relies solely on firewalls, intrusion detection systems, and encryption to protect against cyber threats.

Answer

Firewalls are the primary network security measure, preventing all forms of cyber threats.

Answer

Network security is only relevant to large organizations handling sensitive data.

Question 45

Which of the following is NOT a common type of network security threat?

Accepted Answer

Power outage

Answer

Malware

Answer

Spam

Answer

Phishing

Question 46

In designing an ethical network solution, it is crucial to:

Accepted Answer

Implement network security measures that comply with industry standards and legal regulations.

Answer

Prioritize network performance over privacy concerns.

Answer

Allow users unrestricted access to all network resources without considering security risks.

Question 47

Which combination of Wi-Fi standard and security protocol is most commonly used in modern devices for fast and secure wireless connections?

Accepted Answer

Wi-Fi 6 (802.11ax) with WPA3

Answer

Wi-Fi 5 (802.11ac) with WPA2

Answer

Wi-Fi 4 (802.11n) with WEP

Answer

Wi-Fi 6E (802.11ax) with WPA

Question 48

Which of the following is the standard port for unencrypted HTTP traffic?

Accepted Answer

80

Answer

21

Answer

25

Answer

443

Question 49

What is the primary responsibility of a router?

Accepted Answer

To route packets between different networks

Answer

To connect devices to a network

Answer

To filter traffic based on IP addresses

Answer

To provide security for a network

Question 50

Which of the following is a type of switching device?

Accepted Answer

Bridge

Answer

Hub

Answer

Gateway

Answer

Modem

Question 51

What is the primary purpose of a routing table?

Accepted Answer

Calculates the optimal routes for packets to follow.

Answer

Maintains correspondences between IP addresses and their respective MAC addresses.

Answer

Stores the physical locations of web servers.

Answer

Converts domain names into their equivalent IP addresses.

Question 52

What is the fundamental purpose of an IP address?

Accepted Answer

Uniquely identifying a particular device connected to a network.

Answer

Providing storage space for data.

Answer

Facilitating email transmission.

Answer

Enabling internet browsing.

Question 53

What is the function of a DNS server?

Accepted Answer

Translating domain names into their corresponding IP addresses.

Answer

Providing storage for files and folders.

Answer

Facilitating email transmission.

Answer

Enabling internet browsing.

Question 54

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

Accepted Answer

Presentation

Answer

Network Access

Answer

Transport

Answer

Application

Question 55

What is the primary function of a router?

Accepted Answer

Determining optimal paths for data packets.

Answer

Connecting devices within a network.

Answer

Providing wireless network access.

Answer

Storing data on a network.

Question 56

Which network topology involves connecting all devices to a central hub?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 57

Which of the following is a secure network communication protocol?

Accepted Answer

HTTPS

Answer

HTTP

Answer

TCP

Answer

IP

Question 58

What is the primary function of a firewall?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and remove viruses

Answer

To enhance network performance

Answer

To back up network data

Question 59

What is the primary objective of a network monitoring system?

Accepted Answer

To identify and resolve network issues

Answer

To enhance network performance

Answer

To prevent unauthorized network access

Answer

To back up network data

Question 60

In the TCP/IP model, which layer is responsible for routing packets?

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Data link layer

Question 61

What is the purpose of a Media Access Control (MAC) address?

Accepted Answer

To uniquely identify a device on a network

Answer

To translate IP addresses to physical addresses

Answer

To route packets between networks

Answer

To provide security for network traffic

Question 62

Which type of network switch operates at Layer 2 of the TCP/IP model?

Accepted Answer

Layer 2 switch

Answer

Layer 3 switch

Answer

Layer 4 switch

Answer

Layer 7 switch

Question 63

What is the main distinction between a router and a firewall?

Accepted Answer

Routers connect networks, while firewalls protect them.

Answer

Firewalls connect networks, while routers protect them.

Answer

Routers and firewalls have the same functionality.

Answer

Routers and firewalls are unrelated concepts.

Question 64

What is the function of a subnet mask?

Accepted Answer

To divide a network into smaller segments

Answer

To translate IP addresses to MAC addresses

Answer

To route packets between different networks

Answer

To provide security for network traffic