Day 3 Quiz - Network Ports & Protocols

Objective 1.5/Day 3 -

Which protocol provides secure remote access to network devices for command-line management while encrypting data transmissions?

• SMTP

• FTP

• Telnet

• SSH

Answer explanation

Secure Shell (SSH) is a cryptographic network protocol that provides secure communication over an insecure network. It allows users to securely log into network devices remotely and execute commands on them. Unlike Telnet, which sends data in plaintext, SSH encrypts data transmissions, providing confidentiality and integrity. Therefore, SSH is the preferred choice for secure remote management of network devices.

Objective 1.5/Day 3 -

Which protocol is commonly used for transmitting web pages and other resources on the World Wide Web?

• FTP

• SMTP

• Telnet

• HTTP

Answer explanation

Hypertext Transfer Protocol (HTTP) is the standard protocol used for transmitting web pages, images, videos, and other resources on the World Wide Web. When a user requests a web page by typing a URL into a web browser, the browser communicates with the web server using HTTP to retrieve the requested content. HTTP operates over TCP/IP and typically uses port 80 for communication.

Objective 1.5/Day 3 -

What protocol is primarily responsible for translating domain names into IP addresses on the Internet?

• DHCP

• SMTP

• DNS

• SNMP

Answer explanation

The Domain Name System (DNS) is responsible for translating human-readable domain names (such as www.example.com) into IP addresses (such as 192.0.2.1) on the Internet. DNS operates by maintaining a distributed database of domain names and their corresponding IP addresses, allowing users to access websites and other Internet services using memorable domain names rather than numerical IP addresses.

Objective 1.5/Day 3 -

Which protocol is commonly used for transferring small files between network devices in a simple and lightweight manner?

• FTPS

• SFTP

• TFTP

• FTP

Answer explanation

Trivial File Transfer Protocol (TFTP) is a lightweight protocol commonly used for transferring small files between network devices, such as routers, switches, and network boot servers. Unlike FTP, TFTP does not provide authentication or encryption mechanisms, making it less secure but more efficient for simple file transfers, especially in network environments where security is not a primary concern.

Objective 1.5/Day 3 -

Match the following descriptions to the corresponding protocol:

• File Transfer Protocol (FTP/FTPS)

• Protocol used for secure remote login and command execution on a network. Standard Port: 22

• Telnet

• Protocol used for transferring files between a client and a server over a network. Standard Port: 21. Secured Port: 990

• Secure Shell (SSH)

• Protocol used for secure file transfer over a network. Standard Port: 22

• Secure File Transfer Protocol (SFTP)

• Protocol used for remote terminal access to network devices. Standard Port: 23

• Trivial File Transfer Protocol (TFTP)

• Protocol used for simple and lightweight file transfers over a network. Standard Port: 69

Objective 1.5/Day 3 -

Match the following descriptions to the corresponding protocol:

• Internet Message Access Protocol (IMAP/I

• Protocol used for translating domain names to IP addresses. Standard Port: 53

• Post Office Protocol v3 (POP3/POP3S)

• Protocol used for retrieving email from a mail server. Downloads email to the user’s device. Standard Port: 110. Secured Port: 995

• Simple Mail Transfer Protocol (SMTP/SMTP

• Protocol used for sending email messages between servers. Standard Port: 25. Secured Port: 465

• Domain Name System (DNS)

• Protocol used for accessing and managing email messages on a mail server. Allows you to manages email from multiple devices, while the email stays on the server. Standard Port: 143. Secured Port: 993

Objective 1.5/Day 3 -

Match the following descriptions to the corresponding protocol:

• Network Time Protocol (NTP)

• Protocol used for transmitting and retrieving web pages on the World Wide Web. Standard Port: 80. Secured Port: 443

• Simple Network Management Protocol SNMP

• Protocol used for synchronizing the time of networked devices. Standard Port: 123

• Hypertext Transfer Protocol (HTTP/HTTPS)

• Protocol used for dynamically assigning IP addresses to devices on a network. Standard Ports: 67/68

• Dynamic Host Configuration Protocol DHCP

• Protocol used for managing and monitoring network devices. Standard Ports: 161/162

Objective 1.5/Day 3 -

Match the following descriptions to the corresponding protocol:

• Session Initiation Protocol (SIP)

• Protocol used for file sharing and communication between devices on a network. Standard Port: 445

• Lightweight Directory Access Protocol

• Protocol used for sending and receiving log messages in a network. Standard Port: 514

• Server Message Block (SMB)

• Protocol used for accessing and managing directory services. Standard Port: 389. Secured Port: 636

• Syslog

• Protocol used for initiating, maintaining, and terminating real-time communication sessions over IP networks. Standard Ports: 5060/5061

Objective 1.5/Day 3 -

A system administrator needs to manage several remote servers securely over an unsecured network. The administrator wants to use a protocol that encrypts the connection to prevent unauthorized access. Which protocol and port number should the administrator use for this purpose?

• FTP, port 21

• Telnet, port 23

• SSH, port 22

• HTTP, port 80

Answer explanation

SSH (Secure Shell) uses port 22 and provides a secure, encrypted connection for managing remote servers, unlike FTP or Telnet, which do not encrypt the connection.

Objective 1.5/Day 3 -

A company wants to ensure that their email communications are secure. They plan to configure their email servers to use encrypted communication protocols. Which protocol and port should they use to send encrypted emails?

• SMTP, port 25

• SMTP TLS, port 587

• POP3, port 110

• IMAP, port 143

Answer explanation

SMTP TLS on port 587 is used for sending encrypted emails, ensuring that the communication between the email client and server is secure.