set-6

251. What is the main disadvantage of SSL?

1. SSL is too slow to be effective.

2. SSL is too complex to be used effectively.

3. SSL can cause network performance issues.

4. SSL can be bypassed by attackers.

Show me the answer

Answer: 3. SSL can cause network performance issues.

Explanation:

• SSL introduces additional overhead due to encryption and decryption, which can slow down network performance.

252. What is ARP?

1. A routing protocol

2. A protocol used to map IP addresses to physical addresses

3. A protocol used to map physical addresses to IP addresses

4. None of these

Show me the answer

Answer: 2. A protocol used to map IP addresses to physical addresses

Explanation:

• ARP (Address Resolution Protocol) resolves IP addresses to MAC addresses, enabling communication between devices on a local network.

253. What is RARP?

1. A protocol used to map IP addresses to physical addresses

2. A protocol used to map physical addresses to IP addresses

3. A routing protocol

4. None of these

Show me the answer

Answer: 2. A protocol used to map physical addresses to IP addresses

Explanation:

• RARP (Reverse Address Resolution Protocol) resolves MAC addresses to IP addresses, typically used in diskless workstations.

254. What is IP?

1. A routing protocol

2. A protocol used to map IP addresses to physical addresses

3. A protocol used to map physical addresses to IP addresses

4. None of these

Show me the answer

Answer: 1. A routing protocol

Explanation:

• IP (Internet Protocol) is responsible for addressing and routing packets between devices on a network.

255. What is ICMP?

1. A routing protocol

2. A protocol used to map IP addresses to physical addresses

3. A protocol used to map physical addresses to IP addresses

4. A protocol used to manage network errors and status messages

Show me the answer

Answer: 4. A protocol used to manage network errors and status messages

Explanation:

• ICMP (Internet Control Message Protocol) is used for error reporting and diagnostic functions, such as ping and traceroute.

256. What is the main advantage of ARP over other routing protocols?

1. ARP is faster than other routing protocols.

2. ARP is more secure than other routing protocols.

3. ARP is simpler to use than other routing protocols.

4. Other routing protocols are faster than ARP.

Show me the answer

Answer: 3. ARP is simpler to use than other routing protocols.

Explanation:

• ARP is a simple protocol used to resolve IP addresses to MAC addresses, making it easy to implement and use.

257. What is the port number for HTTP?

1. 21

2. 25

3. 80

4. 443

Show me the answer

Answer: 3. 80

Explanation:

• HTTP (Hypertext Transfer Protocol) uses port 80 for unencrypted web traffic.

258. What is the port number for HTTPS?

1. 21

2. 25

3. 80

4. 443

Show me the answer

Answer: 4. 443

Explanation:

• HTTPS (Hypertext Transfer Protocol Secure) uses port 443 for encrypted web traffic.

259. What is the port number for FTP?

1. 21

2. 25

3. 80

4. 443

Show me the answer

Answer: 1. 21

Explanation:

• FTP (File Transfer Protocol) uses port 21 for file transfers.

260. What is the port number for SMTP?

1. 21

2. 25

3. 80

4. 443

Show me the answer

Answer: 2. 25

Explanation:

• SMTP (Simple Mail Transfer Protocol) uses port 25 for sending emails.

261. What is the port number for Telnet?

1. 21

2. 25

3. 80

4. 443

Show me the answer

Answer: 1. 21

Explanation:

• Telnet uses port 23 for remote terminal access.

262. What is the subnet mask for the following IP address: 192.168.100.25/20?

1. 255.255.0.0

2. 255.255.240.0

3. 255.255.255.0

4. 255.255.255.240

Show me the answer

Answer: 2. 255.255.240.0

Explanation:

• The /20 subnet mask corresponds to 255.255.240.0, which provides 20 bits for the network portion of the address.

263. What is the network address for the following IP address and subnet mask: 192.168.100.25/24?

1. 192.168.100.0

2. 192.168.100.1

3. 192.168.100.24

4. 192.168.100.25

Show me the answer

Answer: 1. 192.168.100.0

Explanation:

• The network address is obtained by applying the subnet mask (255.255.255.0) to the IP address, resulting in 192.168.100.0.

264. What is the broadcast address for the following IP address and subnet mask: 192.168.100.25/22?

1. 192.168.100.0

2. 192.168.100.1

3. 192.168.100.22

4. 192.168.100.255

Show me the answer

Answer: 4. 192.168.100.255

Explanation:

• The broadcast address for the subnet 192.168.100.0/22 is 192.168.100.255.

265. What does IPsec stand for?

1. Internet Protocol Security

2. Internet Protocol Secure

3. Internet Protocol Secured

4. Internet Protocol Securely

Show me the answer

Answer: 1. Internet Protocol Security

Explanation:

• IPsec (Internet Protocol Security) is a suite of protocols used to secure IP communications by encrypting and authenticating packets.

266. What is IPsec used for?

1. Encryption and authentication of IP packets

2. Encryption and authentication of TCP packets

3. Encryption and authentication of UDP packets

4. Encryption and authentication of all packets

Show me the answer

Answer: 1. Encryption and authentication of IP packets

Explanation:

• IPsec provides encryption and authentication for IP packets, ensuring secure communication over IP networks.

267. What is a VPN used for?

1. Virtual Private Networking

2. Virtual Public Networking

3. Virtual Protected Networking

4. Virtual Private Network

Show me the answer

Answer: 4. Virtual Private Network

Explanation:

• A VPN (Virtual Private Network) creates a secure, encrypted connection over a public network, allowing users to access private networks remotely.

268. What does VPN provide?

1. Secure and private communication over a public network

2. Secure and public communication over a private network

3. Insecure and private communication over a public network

4. Insecure and public communication over a private network

Show me the answer

Answer: 1. Secure and private communication over a public network

Explanation:

• VPNs encrypt data and provide a secure tunnel for communication over public networks like the internet.

269. What does IEEE 802.3 stand for?

1. Institute of Electrical and Electronics Engineers 802.3

2. Institute of Electronics and Electrical Engineers 802.3

3. Institute of Electrical Engineers 802.3

4. Institute of Electronics Engineers 802.3

Show me the answer

Answer: 1. Institute of Electrical and Electronics Engineers 802.3

Explanation:

• IEEE 802.3 is the standard for Ethernet, developed by the Institute of Electrical and Electronics Engineers (IEEE).

270. What is IEEE 802.3 known as?

1. Ethernet

2. Token Bus

3. Token Ring

4. CSMA/CD

Show me the answer

Answer: 1. Ethernet

Explanation:

• IEEE 802.3 is the standard for Ethernet, a widely used technology for wired local area networks (LANs).

271. What is the maximum data rate specified by the original IEEE 802.3 standard?

1. 10 Mbps

2. 100 Mbps

3. 1000 Mbps

4. 10 Gbps

Show me the answer

Answer: 1. 10 Mbps

Explanation:

• The original IEEE 802.3 standard, also known as 10BASE-T, supports a maximum data rate of 10 Mbps.

272. What is the most common physical layer standard used by Ethernet networks?

1. 10BaseT

2. 100BaseT

3. 1000BaseT

4. 10000BaseT

Show me the answer

Answer: 3. 1000BaseT

Explanation:

• 1000BaseT, also known as Gigabit Ethernet, is the most common physical layer standard for modern Ethernet networks, supporting speeds of up to 1 Gbps.

273. What is a P2P network?

1. A centralized network where a single server handles all data transfers

2. A decentralized network where data transfers are handled by multiple nodes

3. A hierarchical network where data transfers are handled by a single node

4. A hybrid network where data transfers are handled by a combination of centralized and decentralized nodes

Show me the answer

Answer: 2. A decentralized network where data transfers are handled by multiple nodes

Explanation:

• In a P2P (Peer-to-Peer) network, each node acts as both a client and a server, enabling decentralized data sharing without a central server.

274. What are some examples of P2P applications?

1. BitTorrent, Gnutella, eDonkey

2. Skype, Google Drive, Dropbox

3. Amazon Web Services, Microsoft Azure, Google Cloud

4. HTTP, FTP, SMTP

Show me the answer

Answer: 1. BitTorrent, Gnutella, eDonkey

Explanation:

• BitTorrent, Gnutella, and eDonkey are examples of P2P applications used for file sharing and decentralized communication.

275. What are the benefits of using P2P applications?

1. Decentralized data transfers, reduced server load, lower costs

2. Centralized data transfers, increased server load, higher costs

3. Hierarchical data transfers, increased server load, lower costs

4. Hybrid data transfers, balanced server load, moderate costs

Show me the answer

Answer: 1. Decentralized data transfers, reduced server load, lower costs

Explanation:

• P2P applications reduce reliance on central servers, distribute the load across multiple nodes, and lower infrastructure costs.

276. What are the drawbacks of using P2P applications?

1. Security concerns, copyright infringement, slow data transfers

2. High data transfers, secure communication, no copyright infringement

3. Fast data transfers, secure communication, no copyright infringement

4. Secure data transfers, no copyright infringement, fast communication

Show me the answer

Answer: 1. Security concerns, copyright infringement, slow data transfers

Explanation:

• P2P networks are vulnerable to security risks, may facilitate illegal file sharing, and can suffer from slow transfer speeds due to reliance on peer nodes.

277. What is E-mail?

1. Electronic Message

2. Electromagnetic Message

3. Electronic Mailbox

4. Electromagnetic Mailbox

Show me the answer

Answer: 1. Electronic Message

Explanation:

• E-mail (Electronic Mail) is a method of exchanging digital messages over the internet.

278. What is the most common protocol used for E-mail transmission?

1. SMTP

2. FTP

3. HTTP

4. HTTPS

Show me the answer

Answer: 1. SMTP

Explanation:

• SMTP (Simple Mail Transfer Protocol) is the standard protocol for sending emails.

279. What is the most common format used for E-mail messages?

1. HTML

2. XML

3. Plain Text

4. Rich Text Format

Show me the answer

Answer: 3. Plain Text

Explanation:

• Plain text is the most common format for email messages, though HTML and Rich Text Format are also used.

280. What is the purpose of an E-mail client?

1. To manage and send E-mails.

2. To manage and receive E-mails.

3. To manage and store E-mails.

4. To manage, send, and receive E-mails

Show me the answer

Answer: 4. To manage, send, and receive E-mails

Explanation:

• An email client is a software application used to manage, send, and receive emails.

281. What is Multiplexing?

1. Combining multiple signals into a single signal.

2. Separating a single signal into multiple signals

3. Transmitting multiple signals simultaneously

4. Receiving multiple signals simultaneously

Show me the answer

Answer: 1. Combining multiple signals into a single signal.

Explanation:

• Multiplexing combines multiple data streams into one signal for transmission over a shared medium.

282. What is De-multiplexing?

1. Combining multiple signals into a single signal

2. Separating a single signal into multiple signals

3. Transmitting multiple signals simultaneously

4. Receiving multiple signals simultaneously

Show me the answer

Answer: 2. Separating a single signal into multiple signals

Explanation:

• De-multiplexing separates a combined signal into its original individual signals.

283. What is the purpose of Multiplexing in computer networking?

1. To reduce the number of communication channels required

2. To increase the number of communication channels required

3. To improve the quality of the communication channels

4. To reduce the speed of the communication channels

Show me the answer

Answer: 1. To reduce the number of communication channels required

Explanation:

• Multiplexing allows multiple signals to share a single communication channel, reducing the need for additional channels.

284. What is the purpose of De-multiplexing in computer networking?

1. To reduce the number of communication channels required

2. To increase the number of communication channels required

3. To improve the quality of the communication channels

4. To reduce the speed of the communication channels

Show me the answer

Answer: 2. To increase the number of communication channels required

Explanation:

• De-multiplexing separates a combined signal into multiple signals, enabling multiple communication channels.

285. Which layer 2 device is capable of filtering traffic based on the MAC addresses of the devices connected to it?

1. Hub

2. Switch

3. Router

4. Gateway

5. NIC

Show me the answer

Answer: 2. Switch

Explanation:

• Switches operate at the Data Link Layer (Layer 2) and use MAC addresses to filter and forward traffic between devices.

286. Which layer 3 device is capable of connecting two networks together and forwarding packets between them?

1. Hub

2. Switch

3. Router

4. Gateway

5. NIC

Show me the answer

Answer: 3. Router

Explanation:

• Routers operate at the Network Layer (Layer 3) and forward packets between different networks based on IP addresses.

287. Which of the following devices operates at the network layer of the OSI model and is capable of connecting two different types of networks together?

1. Hub

2. Switch

3. Router

4. Gateway

5. Modem

Show me the answer

Answer: 4. Gateway

Explanation:

• Gateways operate at the Network Layer (Layer 3) and can connect different types of networks, such as a LAN to a WAN.

288. Which layer of the OSI model is responsible for routing and switching packets between networks?

1. Application layer

2. Transport layer

3. Network layer

4. Data link layer

5. Physical layer

Show me the answer

Answer: 3. Network layer

Explanation:

• The Network Layer (Layer 3) is responsible for routing and forwarding packets between networks.

289. Which layer of the OSI model is responsible for providing error-free transmission of data?

1. Application layer

2. Transport layer

3. Network layer

4. Data-link layer

5. Physical layer

Show me the answer

Answer: 2. Transport layer

Explanation:

• The Transport Layer (Layer 4) ensures reliable, error-free data transmission between devices.

290. In which network topology are all devices connected to a central hub or switch?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 3. Star topology

Explanation:

• In a star topology, all devices are connected to a central hub or switch, which manages communication between devices.

291. In which network topology are devices connected in a circular chain?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 2. Ring topology

Explanation:

• In a ring topology, devices are connected in a circular chain, with data traveling in one direction around the ring.

292. In which network topology are all devices connected to a single cable?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 1. Bus topology

Explanation:

• In a bus topology, all devices are connected to a single central cable, known as the bus.

293. In which network topology are devices connected to each other in a redundant manner to provide multiple paths for data to travel?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 4. Mesh topology

Explanation:

• In a mesh topology, devices are interconnected, providing multiple paths for data to travel, ensuring redundancy and fault tolerance.

294. In which network topology are devices connected to a central backbone cable?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 1. Bus topology

Explanation:

• In a bus topology, devices are connected to a central backbone cable, which serves as the main communication channel.

295. Which of the following routing protocols is used in small to medium-sized networks and is based on the hop count metric?

1. OSPF

2. BGP

3. EIGRP

4. RIP

Show me the answer

Answer: 4. RIP

Explanation:

• RIP (Routing Information Protocol) is a distance-vector routing protocol that uses hop count as its metric and is suitable for small to medium-sized networks.

296. Which of the following protocols is used to translate between IP addresses and MAC addresses in a network?

1. ARP

2. DNS

3. ICMP

4. SNMP

Show me the answer

Answer: 1. ARP

Explanation:

• ARP (Address Resolution Protocol) resolves IP addresses to MAC addresses, enabling communication between devices on a local network.

297. Which of the following protocols is used to provide secure communication over a network, especially over the internet?

1. SSL/TLS

2. IPSec

3. PPTP

4. L2TP

Show me the answer

Answer: 2. IPSec

Explanation:

• IPSec (Internet Protocol Security) provides secure communication by encrypting and authenticating IP packets, commonly used in VPNs.

298. Which of the following network devices can inspect and filter traffic based on the content of the packets, and can be used to block malicious traffic?

1. Router

2. Firewall

3. Switch

4. Load balancer

Show me the answer

Answer: 2. Firewall

Explanation:

• Firewalls inspect and filter network traffic based on predefined security rules, blocking malicious traffic and protecting the network.

299. Which of the following protocols is used to manage network devices and monitor network performance?

1. SNMP

2. SMTP

3. FTP

4. HTTP

Show me the answer

Answer: 1. SNMP

Explanation:

• SNMP (Simple Network Management Protocol) is used to monitor and manage network devices, collect performance data, and generate alerts.

300. Which of the following network topologies provides the highest level of fault tolerance and redundancy, with every device connected to every other device in the network?

1. Mesh topology

2. Bus topology

3. Star topology

4. Ring topology

Show me the answer

Answer: 1. Mesh topology

Explanation:

• In a mesh topology, every device is connected to every other device, providing multiple paths for data and ensuring high fault tolerance.

301. Which of the following network topologies is used primarily in the airline industry for flight reservation systems?

1. Bus topology

2. Star topology

3. Mesh topology

4. Tree topology

Show me the answer

Answer: 4. Tree topology

Explanation:

• Tree topology is used in hierarchical systems like airline reservation systems, where data flows from a central root to multiple branches.

302. Which of the following network topologies is used in Ethernet networks and can operate at high speeds?

1. Bus topology

2. Star topology

3. Mesh topology

4. Ring topology

Show me the answer

Answer: 2. Star topology

Explanation:

• Star topology is commonly used in Ethernet networks, where devices are connected to a central switch, enabling high-speed communication.

303. Which of the following network topologies is used in token ring networks, where each device is connected to the next in a circular chain?

1. Bus topology

2. Star topology

3. Mesh topology

4. Ring topology

Show me the answer

Answer: 4. Ring topology

Explanation:

• Ring topology is used in token ring networks, where data travels in a circular chain from one device to the next.

304. Which of the following network topologies is a combination of two or more different network topologies?

1. Hybrid topology

2. Star topology

3. Mesh topology

4. Ring topology

Show me the answer

Answer: 1. Hybrid topology

Explanation:

• Hybrid topology combines two or more different topologies, such as star and bus, to create a more flexible and scalable network.

305. Which of the following network topologies is considered the most reliable due to its redundancy and fault tolerance?

1. Bus topology

2. Ring topology

3. Star topology

4. Mesh topology

Show me the answer

Answer: 4. Mesh topology

Explanation:

• Mesh topology provides the highest level of redundancy and fault tolerance, as every device is connected to every other device, ensuring multiple paths for data.