Application Layer Protocols

Question 1

HTTP (Hypertext Transfer Protocol)

Answer 1

Is used on the internet to allow clients to request web pages from web servers and to allow client interaction with those web servers.

Question 2

DNS (Domain Name System)

Answer 2

Is used to convert fully qualified domain names (FQDNs) to IP address.

Question 3

SMTP (Simple Mail Transfer Protocol)

Answer 3

Is used to send or route mail over a TCP/IP network such as the Internet.

Question 4

POP3 (Post Office Protocol version 3)

Answer 4

Is the Internet protocol used to retrieve email from. Mail server down to the pop3 client over TCP port 110.

Question 5

Internet Message Access Protocol 4 (IMAP4)

Answer 5

Is another protocol similar to POP3 that allows clients to retrieve messages from a mail server using TCP port 143. IMAP4 allows additional folders other than the four basic ones provided with POP3.

Question 6

SNMP (Simple Network Management Protocol)

Answer 6

Is an internet standard that provides a simple method for remotely managing virtually any network device that supports SNMP over UDP port 161.

Question 7

FTP (File Transfer Protocol)

Answer 7

Is a TCP/IP protocol that exists to upload and download files between FTP servers and clients.

Question 8

TFTP (Trivial File Transfer Protocol)

Answer 8

Is a simple protocol compared with FTP and supports only reading and writing to files.

Question 9

SFTP (Secure File Transfer Protocol)

Answer 9

Is an interactive file transfer protocol similar to FTP, but it encrypts all traffic between the SFTP client and SFTP server.

Question 10

Telnet

Answer 10

Is a terminal emulation protocol that runs on TCP port 23 and allows a client to run or emulate the program running on the server.

Question 11

Secure Shell (SSH)

Answer 11

Is a program used to create a shell, or session, with a remote system using a secure connection over TCP port 22.

Question 12

Secure Copy Protocol (SCP)

Answer 12

Is responsible for coping files from a remote server to the local system over a secure connection, ensuring that data in transit is kept Confidential.

Question 13

Network Time Protocol (NTP)

Answer 13

Is used to to synchronize the clocks of PCs on a network or the internet.

Question 14

Lightweight Directory Access Protocol (LDAP)

Answer 14

Is a protocol that allows LDAP clients to connect to the network database, or directory, and to query the database for information about its objects such as user accounts and printers.

Question 15

NetBIOS (Network Basic Input/Output System)

Answer 15

Is an application Programming interface (API) that is used to make network calls to remote systems and is used for session management functionality.

Question 16

Fibre Channel

Answer 16

A technology that transmit data of up to a projected 4 Gbps and uses special optical cables to connect the shared storage devices to servers.

Question 17

iSCSI (Internet Small Computer systems Interface)

Answer 17

an IP-based protocol used to communicate with storage devices.

Question 18

FCoE (Fibre Channel over Ethernet)

Answer 18

Is a protocol used to carry Fibre Channel commands over an Ethernet network in Ethernet frames.