3 - CompTIA A+ 220-1201 Practice Test

A type of cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between networked computers is called:

SSH (Secure Shell)

Telnet: (Select 3 answers)

• Provides username & password authentication

• Transmits data in an unencrypted form 

• Enables remote login and command execution

 Which of the answers listed below refers to a secure replacement for Telnet?

SSH (Secure Shell)

The SMTP protocol is used for: (Select 2 answers)

• Sending email messages between mail servers

• Sending email messages from a client device

Which of the following refers to a system that translates domain names to IP addresses and stores other domain-related records?

DNS (Domain Name System)

Which network protocol provides an automated alternative to manual IP address allocation?

DHCP (Dynamic Host Configuration Protocol)

Which of the protocols listed below is used to retrieve the contents of an Internet page from a web server?

HTTP (Hypertext Transfer Protocol)

POP3 is used for:

Email retrieval

Which of the answers listed below refer to IMAP? (Select 2 answers)

• Offers improved functionality in comparison to POP3 

• Serves the same function as POP3

Which of the following answers refers to an API that enables communication between hosts on a LAN?

NetBIOS

The function of the NetBT protocol is to allow NetBIOS services to be used over TCP/IP networks. (T/F)

True

LDAP (Lightweight Directory Access Protocol) is an example of:

• Directory access protocol

Which protocol secures web traffic with SSL/TLS encryption to ensure the confidentiality, integrity, and authentication of the data exchanged between a user's browser and a web server?

HTTPS (Hypertext Transfer Protocol Secure)

SMB (Server Message Block) is a protocol used for:

File and printer sharing between devices on a network

What are the characteristic features of SMB (Server Message Block)/CIFS (Common Internet File System)? (Select 2 answers)

• Primarily used in Microsoft Windows environments

• Used to provide shared access to files, directories, and devices

Which Microsoft-proprietary protocol enables remote access and administration of another networked host through a graphical interface?

RDP (Remote Desktop Protocol)

UDP is a connection-oriented protocol using a three-way handshake, which is a set of initial steps required for establishing a network connection. UDP supports error checking, flow control (managing the amount of data that is being sent), sequencing (rearranging packets that arrived out of order), and retransmission of lost packets. Example applications of UDP include the transmission of text and image data. (T/F)

False (UDP is connectionless)

TCP is an example of a connectionless protocol. Since TCP does not use a three-way handshake to establish a network connection, it is considered an unreliable or best-effort protocol. Example applications of TCP include the transmission of video and audio streaming data.

False (TCP is connection oriented)

Which port enables the FTP data connection for transferring file data?

TCP port 20

The FTP control connection to administer a session is established through:

TCP port 21

Which port does the SSH protocol use?

TCP port 22

Which TCP port is used by the Telnet protocol?

Port 23

TCP port 25 is used by:

SMTP (Simple Mail Transfer Protocol)

Which TCP/UDP port is assigned to DNS?

Port 53

A DHCP server operates on UDP port:

Port 67