TCP/IP Protocols

Question 1

Provides basic TCP/IP functionality by creating a layer 2 connection between two devices over a serial line.

Answer 1

Serial Line Internet Protocol (SLIP) (Network Interface Layer)

Question 2

Provides layer 2 connectivity like SLIP, but is much more sophisticated and capable. This protocol is itself a suite of protocols that allow for functions such as authentication, data encapsulation, encryption, and aggregation, thereby facilitating TCP/IP operation over WAN links

Answer 2

Point-to-Point Protocol (PPP) (Network Interface Layer)

Question 3

Used to map layer 3 IP addresses to layer 2 physical network addresses.

Answer 3

Address Resolution Protocol (ARP) (Network interface layer / Internet layer)

Question 4

Determines the layer 3 address of a machine from its layer 2 address. Now mostly superseded by BOOTP and DHCP

Answer 4

Reverse Address Resolution Protocol (RARP) (Network interface layer / Internet layer)

Question 5

Provides encapsulation and connectionless delivery of transport layer messages over a TCP/IP network. Also responsible for addressing and routing functions.

Answer 5

Internet Protocol / Internet Protocol Version 6 (IP / IPv6) (Internet layer)

Question 6

Allows addresses on a private network to be automatically translated to different addresses on a public network, thereby providing address sharing and security benefits. May not be considered a protocol in the strict sense of the work.

Answer 6

IP Network Address Translation (IP NAT) (Internet layer)

Question 7

A set of IP-related protocols that improve the security of IP transmission

Answer 7

IP Security (IPsec) (Internet layer)

Question 8

Resolves certain problems with IP associated with mobile devices

Answer 8

IP Mobility Support (Mobile IP) (Internet layer)

Question 9

A support protocol for IP and IPv6 that provides error reporting and information request-and-replay capabilities to hosts

Answer 9

Internet Control Message Protocol (ICMP / ICMPv4 / ICMPv6) (Internet layer)

Question 10

A new support protocol for IPv6 that includes several functions performed by ARP and ICMP in conventional IP

Answer 10

Neighbor Discovery Protocol (NDP) (Internet layer)

Question 11

Protocols used to support the routing of IP datagrams and the exchange of routing information

Answer 11

Routing Information Protocol, Open Shortest Path First, Gateway-to-Gateway Protocol, HELLO Protocol, Interior Gateway Routing Protocol, Enhanced Interior Gateway Routing Protocol, Border Gateway Protocol, Exterior Gateway Protocol (RIP, OSPF, GGP, HELLO, IGRP, EIGRP, BGP, EGP) (Internet layer)

Question 12

The main transport layer protocol for TCP/IP. Established and manages connections between devices and ensures reliable and flow-controlled delivery of data using IP.

Answer 12

Transmission Control Protocol (TCP), (Host-to-Host Transport layer)

Question 13

A transport protocol that can be considered a severely stripped-down version of TCP. It is used to send data in a simple way between application processes, without the many reliability and flow-management features of TCP, but often with greater efficiency.

Answer 13

User Datagram Protocol (UDP), (Host-to-Host Transport layer)

Question 14

Provides the ability to refer to IP devices using names instead of just numerical IP addresses. Allows machines to resolve these names into their corresponding IP addresses.

Answer 14

Domain Name System (DNS) (Application layer)

Question 15

Allows files to be shared seamlessly across TCP/IP networks

Answer 15

Network File Sharing (NFS) (Application layer)

Question 16

Developed to address some of the issues with RARP and used in a similar manner, to allow the configuration of a TCP/IP device at startup. Generally superseded by DHCP.

Answer 16

Bootstrap Protocol (BOOTP) (Application layer)

Question 17

A complete protocol for configuring TCP/IP devices and managing IP addresses. The successor to RARP and BOOTP, it includes numerous features and capabilities.

Answer 17

Dynamic Host Control Protocol (DHCP) (Application layer)

Question 18

A full-featured protocol for remote management of networks and devices

Answer 18

Simple Network Management Protocol (SNMP) (Application layer)

Question 19

A diagnostic “protocol” (really a part of SNMP) used for remote monitoring of network devices

Answer 19

Remote Monitoring (RMON) (Application layer)

Question 20

Protocols designed to permit the transfer of all types of files from one device to another.

Answer 20

File Transfer Protocol, Trivial File Transfer Protocol (FTP, TFTP) (Application layer)

Question 21

Protocols that define the formatting, delivery, and storage of email messages on TCP/IP networks.

Answer 21

RFC 822, Multipurpose Internet Mail Extensions, Simple Mail Transfer Protocol, Post Office Protocol, Internet Message Access Protocol (RFC 822, MIME, SMTP, POP, IMAP) (Application layer)

Question 22

Enables the operation of the Usenet online community by transferring Usenet news messages between hosts

Answer 22

Network News Transfer Protocol (NNTP) (Application layer)

Question 23

Transfer hypertext documents between hosts; implements the World Wide Web.

Answer 23

Hypertext Transfer Protocol (HTTP) (Application layer)

Question 24

An older document-retrieval protocol, now largely replaced by the World Wide Web.

Answer 24

Gopher Protocol (Gopher) (Application layer)

Question 25

Allows a user on one machine to establish a remote terminal session on another

Answer 25

Telnet Protocol (Telnet) (Application layer)

Question 26

Permit commands and operations on one machine to be performed on another

Answer 26

Berkeley ‘r’ Commands (Application layer)

Question 27

Allows real-time chatting between TCP/IP users

Answer 27

Internet Relay Chat (IRC) (Application layer)

Question 28

A collection of software tools that allows administrators to manage, configure, and troubleshoot TCP/IP internetworks.

Answer 28

Administration and Troubleshooting Utilities and Protocols