Computer Knowledge

Computer Networks

2,614 Questions

Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.

OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands

Computer Networks Questions

Multiple choice

Just as network firewall screens incoming and outgoing traffic for that network, which of the following security techniques screens incoming and outgoing traffic on a single workstation?

  1. Stateful inspection firewall

  2. Personal firewall

  3. Transport layer security

  4. Message integrity check

  5. Sender authenticity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Just as a network firewall screens incoming an outgoing traffic for that network, this security technique screens traffic on a single workstation.

Multiple choice

Which of these protocols is used by network devices to send error messages?

  1. POP

  2. HTTP

  3. FTP

  4. ICMP

  5. IP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Internet Control Message Protocol (ICMP) is one of the main protocols of the Internet Protocol Suite. It is used by network devices, like routers, to send error messages indicating; that a requested service is not available or that a host or router could not be reached.

Multiple choice

If you want to locate the hardware address of a local device, which protocol would you use?

  1. ARP

  2. RARP

  3. ICMP

  4. PING

  5. PONG
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ARP (Address Resolution Protocol) is the correct protocol used to find the hardware (MAC) address of a device on a local network when you know its IP address. RARP (Reverse ARP) does the opposite - it finds an IP address from a known MAC address. ICMP is used for diagnostic messages (like ping), and PING is a tool that uses ICMP, not a protocol itself. PONG is not a real networking protocol.

Multiple choice

Which of the following security techniques receives protocol data units, interprets them and passes the same protocol data units that archieves the same result?

  1. Transport layer security

  2. Sender authenticity

  3. Message integrity check

  4. Stateful inspection firewall

  5. Guard
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This security technique receives protocol data units, interprets them and passes through the same protocol data units that achieve the same result.

Multiple choice

For networking in Java, which package needs to be imported?

  1. java.net

  2. java.socket

  3. java.networking

  4. java.serversocket
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The java.net package provides all networking classes and interfaces in Java, including Socket, ServerSocket, URL, HttpURLConnection, and InetAddress. This package is essential for network communication and protocol handling. The other options like java.socket, java.networking, and java.serversocket don't exist as standard Java packages.

Multiple choice

The address resolution protocol is translated into

  1. physical address into the hardware address

  2. an IP address into a logical address

  3. a hardware address into a physical address

  4. an IP address into a hardware address
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Address resolution protocol is used to map an IP address into a hardware address because ARP is used to map a logical address or IP address into a physical address or hardware address. So, this is the correct answer.

Multiple choice

Which of the following is a pair of signal transduction pathway database?

  1. MANET and Reactome

  2. MetaCyc and Netpath

  3. MANET and Netpath

  4. MetaCyc and Reactome

  5. NetPath and Reactome
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

NetPath is a manually curated resource of human signal transduction pathways. Reactome is a navigable map of human biological pathways, ranging from metabolic processes (metabolic pathways) to hormonal signalling (signal transduction pathways).

Multiple choice

Which of the following is/are false about Application-layer firewall?

  1. This firewalls work on the application level of the TCP/IP stack.

  2. It is used to intercept all packets traveling to or from an application.

  3. This firewall does not run on dedicated hardware or as software on a general-purpose machine.

  4. This firewall prevents bowsers from cyber attack or worms.

  5. Both (3) and (4)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is false statement about Application layer firewalls as they run on dedicated hardware or as software on a general-purpose machine.

Multiple choice

Which of the following security techniques essentially intrudes in the middle of the protocol exchange, seeming like a destination in communication with the sender?

  1. Application proxy

  2. Stateful inspection firewall

  3. Message integrity check

  4. Message confidentiality

  5. Transport layer security

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This security technique essentially intrudes in the middle of the protocol exchange, seeming like a destination in communication with the sender.