Netacad - Modules 9-12: Data Communications and Network Services

A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the IMAP4 protocol to access email messages stored on the local server?

143

An employee of a company is attempting to remotely access a computer system using a virtual terminal session via Telnet. Which destination port number should the employee put in the remote access software being used?

23

A new employee is configuring a cell phone for company email. Once configured, what is the destination port number used when the employee sends an email from the phone?

25

A client device has initiated a secure HTTP request to a web browser. Which well-known port address number is associated with the destination address?

443

Tunneling

A method of transporting an IPv6 packet over an IPv4 network.

Simple Main Transfer Protocol (SMTP)

Sends email messages and attachments from clients to severs and from servers to other email servers.

A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?

TFTP

Destination Port

The client places a destination port number in the segment to tell the destination server what service is being requested.

A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?

POP3

Which protocol removes messages from the server after they have been accessed by a client?

POP3

Source Port

is dynamically generated by the sending device to identify a conversation between two devices.

Which Windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state?

netstat

Internet Protocol (IP)

responsible for taking the formatted segments from TCP, assigning the logical addressing, and encapsulation them into packets for routing to the destination host.

Typically, which network device would be used to perform NAT for a corporate environment?

router

A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?

DNS

Network Address Translation (NAT)

Converts private addresses to routable addresses

A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?

DHCP

A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?

FTP

A client packet is received by a server. The packet has a destination port number of 443. What service is the client requesting?

HTTPS

A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?

IMAP

What protocol retains a message in a mailbox on a server, even after the message is accessed by a user on a local client device?

IMAP4

Uniform Resource Identifier (URI)

Is a string of characters that identifies a specific network resource.

Default Gateway

Is the IP address o an interface on the router on the same network as the sending host.

Domain Name System (DNS)

Resolves internet names to IP addresses

A client packet is received by a server. The packet has a destination port number of 25. What service is the client requesting?

SMTP

A client packet is received by a server. The packet has a destination port number of 161. What service is the client requesting?

SNMP

A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?

SSH

Uniform Resource Locator (URL)

This defines the network location of a specific resource on the network.

Uniform Resource Name (URN)

This identifies only the namespace of the resource (web page, document, image, etc.) without reference to the protocol

Internet Message Access Protocol (IMAP)

Used by email clients to retrieve email and attachments from a remote server.

Post Office Protocol (POP)

Used by email clients to retrieve email and attachments from a remote server.

Hypertext Transfer Protocol (HTTP)

Used by web browsers to request web pages and web servers to transfer the files that make up web pages of the World Wide Web.

File Transfer Protocol (FTP)

Used for interactive file transfer between systems

Dynamic Host Configuration Protocol (DHCP)

Used to automatically configure devices with IP addressing and other necessary information to enable them to communicate over the internet.

Secure Shell (SSH)

Used to provide remote access to servers and networking devices

Network Address Translation 64 (NAT64)

allows IPv6-enabled devices to communicate with IPv4-enabled devices using a translation technique

Which network technology allows devices to communicate using both IPv4 and IPv6 addressing at the same time?

dual stack

Transmission Control Protocol (TCP)

ensures that IP packets are sent reliably, and any missing packets are resent. TCP provides proper ordering of packets received out of order.

What protocol header information is used at the transport layer to identify a target application?

port number

Which transport layer information is added to both the TCP and UDP headers?

port numbers