Protocols

Question 1

What is Media Gateway Control Protocol?

Answer 1

Call control and communication protocol for VOIP

Question 2

What is ICMP (Internet Control Message Protocol)?

Answer 2

A network layer protocol used by network devices to diagnose network communication issues. ICMP is mainly used to determine whether or not data is reaching its intended destination in a timely manner.
ping
tracert

Question 3

What is H.323/H.264?

Answer 3

L5 Protocol
Used to set up, maintain, and tear down voice and video connections.

Port 1720

Question 4

Explain Secure Shell (SSH)

Answer 4

Provides secure remote control of another machine using a text-based Environment

Port 22

Question 5

Explain Secure FTP (SFTP)

Answer 5

Provides secure file transfer via SSH

Port 22

Question 6

Explain Telnet

Answer 6

Provides unsecure remote control of another machine using a text-based Environment

Port 23

Question 7

Explain Simple Mail Transfer Protocol (SMTP)

Answer 7

Provides the ability to send emails over the network.

Port 25

Question 8

Explain Trivial File Transfer Protocol (TFTP)

Answer 8

Used as a lightweight file transfer method for sending configuration files or network booting of an OS.

Port 69

Question 9

Explain Post Office Protocol Version Three (POP3).

Answer 9

Used for receiving incoming email.

Port 110

Question 10

Explain Network Time Protocol (NTP).

Answer 10

Used to keep accurate time for clients on a network.

Por 123

Question 11

Explain Network Basic Input/Output System (NetBIOS).

Answer 11

Used for file or printer sharing in a Windows network.

Port 139, 137, 138

Question 12

Explain Internet Mail Application Protocol (IMAP)

Answer 12

A newer method of retrieving incoming emails which improves upon the older POP3.

Port 143

Question 13

Explain Simple Network Management Protocol (SNMP)

Answer 13

Used to collect data about network devices.

Port 161, 162

Question 14

Explain Lightweight Directory Access Protocol (LDAP)

Answer 14

Used to provide directory services to your network.

Port 389

Question 15

Explain Hypertext Transfer Protocol - Secure (HTTPS)

Answer 15

Provides secure web browsing via TLS/SSL

Question 16

Explain Server Message Block (SMB)

Answer 16

Used for Windows file and printer sharing services

Port 445

Question 17

Explain System Logging Protocol (Syslog) use?

Answer 17

Used to send logging data back to a centralized server.

Question 18

Explain Simple Mail Transfer Protocol Transport Layer Security (SMTP TLS)

Answer 18

Secure and encrypted way to send emails

Question 19

Explain Lightweight Directory Access Protocol - Secure (LDAPS)

Answer 19

Provides Secure Directory Services

Port 636

Question 20

Explain Internet Message Access Protocol over SSL (IMAP over SSL)

Answer 20

Secure and encrypted was to receive email

Question 21

Explain Post Office Protocol Version 3 over SSL (POP3 over SSL)

Answer 21

Secure and encrypted way to receive email

Question 22

Explain Structured Query Language Server Protocol (SQL)

Answer 22

Used for communication from a client to the database engine
MS

Question 23

Explain SQLnet Protocol

Answer 23

Used for communication from a client to an Oracle database

Question 24

Explain MySQL

Answer 24

Used for communication from a client to the MySQL database engine

Question 25

Explain Remote Desktop Protocol (RDP)

Answer 25

Provide graphical remote control over another client or server (MS proprietary) Port 3389

Question 26

Explain Session Initiation Protocol (SIP)

Answer 26

Used to initiate VoIP and video calls Port 5060, 5061

Question 27

What is Real-time Transport Protocol?

Answer 27

L5 Protocol Used to set up, maintain, and tear down voice and video connections. delivering media-based data (such as VoIP) through the network Port 5004, 5005

Question 28

What is Real-Time Streaming Protocol (RTSP)?

Answer 28

Communicates with a media server and controls the playback of the server's media files. Port 554

Question 29

NTP Stratum

Answer 29

Stratum 0 devices (including atomic and gps clocks) are the most accurate, but cannot be connected to via a network connection. A Stratum 0 device is usually used as a reference clock (or synchronisation source) for a Stratum 1 time server. Stratum 1 devices are the most accurate ntp time sources accessible via a network connection. A Stratum 1 device would normally be synchronised via a Stratum 0 reference clock. Stratum 2 devices are synchronised from a Stratum 1 device across a network connection. Due to network jitter and delays, Stratum 2 servers are not as accurate as Stratum 1 time servers. An NTP client synchronised from a Stratum 2 source would be a Stratum 3 device etc...

Question 30

Extensible Authentication Protocol (EAP)

Answer 30

Allows for numerous different mechanisms of authentication.

Question 31

Lightweight Directory Access Protocol (LDAP)

Answer 31

Validates a username and password combination against an LDAP server as a form of authentication.

Question 32

Point-to-Point Protocol (PPP)

Answer 32

-Commonly used Layer 2 protocol on dedicated lease lines to transmit multiple Layer 3 protocols (IP, IPX) -directly connects two network devices at the data link layer -WAN

Question 33

Password Authentication Protocol (PAP)

Answer 33

Performs one-way authentication between client and server Sent in the clear

Question 34

Session Initiation Protocol (SIP)

Answer 34

Used to setup, maintain, and tear down calls

Question 35

Internet Group Management Protocol (IGMP)

Answer 35

*Lets routers know which interfaces have multicast receivers *Allows clients to join a multicast group

Question 36

Challenge Handshake Authentication Protocol (CHAP)

Answer 36

-Sends client a string of random text "challenge" which is then encrypted using a password and sent back to the server -Performs one-way authentication using a three-way handshake. -Hashed credentials

Question 37

Extensible Authentication Protocol (EAP)

Answer 37

-Allows for more secure authentication methods to be used instead of just a username and a password -Acts as a framework and transport for other authentication protocols

Question 38

Gateway Load Balancing Protocol (GLBP)

Answer 38

Cisco's proprietary first-hop redundancy which focuses on load balancing over redundancy

Question 39

LACP Link Aggregation Control Protocol (LACP)

Answer 39

-IEEE 802.3ad -Achieves redundancy -Multiple links between network devices -Load balancing over multiple links -Combines multiple connections (links) into a single logical connection to load balance