J277 Protocols and Layers

Which protocol is used for secure communication over the web?

• HTTP
• HTTPS
• TCP
• UDP
• FTP

Answer explanation

HTTPS provides secure communication over the web by encrypting data transmitted between the client and the server.

Which layer of the OSI model is responsible for end-to-end communication and error recovery?

• Transport layer
• Internet layer
• Link layer
• Application layer
• FTP

Answer explanation

The Transport layer is responsible for end-to-end communication, including error recovery and flow control, among other functions.

Which technology is used for wireless local area networking?

• TCP
• UDP
• WiFi
• ADSL
• Ethernet

Answer explanation

WiFi is used for wireless local area networking, allowing devices to connect to a local network wirelessly.

Which generation of mobile networks provides faster speeds and lower latency compared to its predecessors?

• 3G
• 4G
• 5G
• WiFi
• Ethernet

Answer explanation

5G networks provide faster speeds and lower latency compared to previous generations, enabling advanced applications like virtual reality and real-time gaming.

Which protocol is commonly used for transferring files over the internet?

• IP
• FTP
• SMTP
• Ethernet
• HTTP

Answer explanation

FTP (File Transfer Protocol) is commonly used for transferring files over the internet, allowing users to upload and download files from remote servers.

Which protocol is used for retrieving emails from a mail server?

• FTP
• IMAP
• POP3
• HTTP
• SMTP

Answer explanation

POP3 (Post Office Protocol version 3) is used for retrieving emails from a mail server to a client device.

Which layer of the OSI model is responsible for routing and forwarding of packets?

• Application layer
• Internet layer
• Link layer
• Transport layer
• FTP

Answer explanation

The Internet layer is responsible for routing and forwarding of packets between networks in the OSI model.

Which technology is used for connecting devices within a limited area, typically within a single building or campus?

• Ethernet
• 3G
• 5G
• WiFi
• ADSL

Answer explanation

Ethernet is commonly used for connecting devices within a limited area, such as a single building or campus, through wired connections.

Which protocol is used for sending emails?

• HTTP
• SMTP
• TCP
• UDP
• FTP

Answer explanation

SMTP (Simple Mail Transfer Protocol) is used for sending emails from a client to a mail server or between mail servers.

Which layer of the OSI model is responsible for logical addressing and routing?

• Link layer
• Internet layer
• Transport layer
• Application layer
• FTP

Answer explanation

The Internet layer is responsible for logical addressing (IP addresses) and routing packets between different networks.