Competitive Exams : Computer Awareness - Networks (Set 3)

Question 1

Which of the following scenarios primarily involves a Layer 2 switch making forwarding decisions based on VLAN tags and MAC addresses, but also requires a Layer 3 device for inter-VLAN routing due to different subnet requirements?

Accepted Answer

C) A departmental network with multiple VLANs, where hosts in different VLANs need to communicate.

Answer

A) A simple peer-to-peer connection between two computers.

Answer

B) A network where all devices are on a single broadcast domain.

Answer

D) A wide area network (WAN) connecting two geographically distant offices.

Question 2

A network administrator configures a firewall to allow only HTTP and HTTPS traffic from the internal network to the internet, blocking all other outbound connections by default. This is an example of implementing which type of firewall rule?

Accepted Answer

B) Application-layer gateway.

Answer

A) Stateful packet inspection.

Answer

C) Packet filtering.

Answer

D) Circuit-level gateway.

Question 3

In a scenario where a large organization needs to ensure that critical applications receive guaranteed bandwidth and priority over less important traffic, especially during peak usage, which QoS (Quality of Service) mechanism would be most effective?

Accepted Answer

D) Differentiated Services (DiffServ).

Answer

A) Fair queuing.

Answer

B) Weighted Round Robin (WRR).

Answer

C) First-In, First-Out (FIFO) queuing.

Question 4

Consider a situation where two devices on a network are trying to send data simultaneously over a shared medium, leading to data corruption. This specific issue is known as a collision. Which access method is designed to detect and handle such collisions efficiently in a wired Ethernet LAN?

Accepted Answer

A) CSMA/CD.

Answer

B) CSMA/CA.

Answer

C) Token Passing.

Answer

D) Polling.

Question 5

An organization has a private network using the IP address range 192.168.1.0/24. They want to connect to the internet but need to conceal their internal IP addresses from external networks, allowing multiple internal devices to share a single public IP address for outbound communication. Which network technology is most suitable for this requirement?

Accepted Answer

C) NAT (Network Address Translation).

Answer

A) DNS (Domain Name System).

Answer

B) DHCP (Dynamic Host Configuration Protocol).

Answer

D) VPN (Virtual Private Network).

Question 6

A web server is configured to handle multiple client requests concurrently. When a client initiates a connection to the server, a three-way handshake occurs. Which transport layer protocol is primarily responsible for establishing and managing this reliable, connection-oriented communication?

Accepted Answer

B) TCP (Transmission Control Protocol).

Answer

A) UDP (User Datagram Protocol).

Answer

C) IP (Internet Protocol).

Answer

D) ICMP (Internet Control Message Protocol).

Question 7

An IoT device network relies on low-power, short-range communication for sensor data collection within a smart home environment. Devices need to form a mesh network to extend coverage and ensure reliability. Which wireless technology is best suited for this specific requirement?

Accepted Answer

A) Zigbee.

Answer

B) Wi-Fi (802.11 ac).

Answer

C) 5G cellular.

Answer

D) Satellite communication.

Question 8

A company needs to implement a network security solution that inspects application-layer content, such as HTTP headers and FTP commands, to detect and prevent sophisticated attacks like SQL injection or cross-site scripting (XSS). Which type of firewall or security device would be most effective?

Accepted Answer

D) Next-Generation Firewall (NGFW) or Web Application Firewall (WAF).

Answer

A) Packet filtering firewall.

Answer

B) Stateful inspection firewall.

Answer

C) Circuit-level gateway firewall.

Question 9

In a hierarchical network design, which layer is responsible for providing high-speed forwarding and ensuring optimal data paths between different distribution layer devices, often acting as the backbone for the entire network?

Accepted Answer

A) Core layer.

Answer

B) Distribution layer.

Answer

C) Access layer.

Answer

D) Edge layer.

Question 10

A company implements a new VoIP system, and users report frequent voice quality issues, including choppy audio and delays. Upon investigation, it is found that network packets are arriving out of order and with varying delays. Which network performance issue is primarily responsible for these symptoms?

Accepted Answer

B) Jitter.

Answer

A) High bandwidth utilization.

Answer

C) Low throughput.

Answer

D) Packet loss.

Question 11

A network engineer is troubleshooting an issue where a server cannot communicate with devices on a remote network segment, even though it can ping devices within its local subnet. The `ip route` command output shows no default gateway configured. Which specific network configuration element is missing?

Accepted Answer

D) Default gateway.

Answer

A) DNS server address.

Answer

B) Subnet mask.

Answer

C) IP address.

Question 12

In the context of the TCP/IP model, which layer is responsible for translating domain names (like www.example.com) into IP addresses, a critical function for web browsing and other internet services?

Accepted Answer

A) Application layer.

Answer

B) Transport layer.

Answer

C) Internet layer.

Answer

D) Network access layer.

Question 13

Which of the following describes a key characteristic of a Virtual Private Network (VPN) that enables secure communication over an untrusted public network like the internet?

Accepted Answer

C) It creates an encrypted tunnel for data transmission.

Answer

A) It uses public IP addresses exclusively.

Answer

B) It eliminates the need for any firewalls.

Answer

D) It routes all traffic directly without any intermediaries.

Question 14

Which network topology uses a central hub or switch to which all devices are connected?

Accepted Answer

C) Star Topology

Answer

A) Ring Topology

Answer

B) Bus Topology

Answer

D) Mesh Topology

Question 15

A network device that filters network traffic by forwarding data packets only to specific destination MAC addresses is known as a:

Accepted Answer

B) Switch

Answer

A) Hub

Answer

C) Repeater

Answer

D) Modem

Question 16

Which layer of the OSI model is responsible for establishing, managing, and terminating sessions between applications?

Accepted Answer

A) Session Layer

Answer

B) Transport Layer

Answer

C) Presentation Layer

Answer

D) Application Layer

Question 17

Which of the following IP address ranges is reserved for private networks?

Accepted Answer

D) All of the above

Answer

A) 10.0.0.0 to 10.255.255.255

Answer

B) 172.16.0.0 to 172.31.255.255

Answer

C) 192.168.0.0 to 192.168.255.255

Question 18

Which protocol is connection-oriented and provides reliable, ordered, and error-checked delivery of data streams between applications?

Accepted Answer

A) TCP (Transmission Control Protocol)

Answer

B) UDP (User Datagram Protocol)

Answer

C) IP (Internet Protocol)

Answer

D) ICMP (Internet Control Message Protocol)

Question 19

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

Accepted Answer

C) To filter network traffic and prevent unauthorized access

Answer

A) To amplify network signals

Answer

B) To assign IP addresses to devices

Answer

D) To connect multiple separate networks

Question 20

What is the primary function of a router in a computer network?

Accepted Answer

B) To connect multiple network segments and forward data packets between them.

Answer

A) To filter network traffic based on MAC addresses.

Answer

C) To convert digital signals to analog signals for transmission.

Answer

D) To amplify network signals to extend their range.

Set 3Competitive Exams : Computer Awareness - Networks