TCP/IP

Question 1

TCP/IP Layers

Answer 1

Network Interface
Internet
Transport
Application

Question 2

Purpose of Network Interface Layer

Answer 2

Physical and electrical components

Transmit bits across the network

Question 3

Purpose of Internet Layer

Answer 3

Packages data into IP diagrams and routes these IP diagrams between hosts across the network

Question 4

Purpose of Transport Layer

Answer 4

Provides communication management between hosts

Defines level of service and status of connection used for transport

Question 5

Purpose of Application Layer

Answer 5

Defines TCP/IP application protocols

End-user interaction

Question 6

Ports

Answer 6

Allows IP addresses to know which applications are listening on a system

Question 7

Port numbers

Answer 7

0 - 65,535
Well known & reserved 0 - 1023
Ephemeral ports: 1024 - 65,535

Question 8

IPv4 packets

Answer 8

Consists of source address, destination address, IP flags, and protocol

Question 9

FTP

Answer 9

File Transfer Protocol
Port 20, 21
Transfer files

Question 10

SSH

Answer 10

Secure Shell
Port 22
Remote login

Question 11

Telnet

Answer 11

Port 23

Unsecure remote login

Question 12

SMTP

Answer 12

Simple Mail Transfer Protocol
Port 25
Email

Question 13

DNS

Answer 13

Domain Name System
Port 53
Converts names to IP addresses

Question 14

DHCP

Answer 14

Port 67, 68
Dynamically assigns IP address and config parameters to client
Allows computers to request IP address ad config parameters

Question 15

TFTP

Answer 15

Trivial File Transfer Protocol
Port 69
Stripped down FTP

Question 16

HTTP

Answer 16

HyperText Transfer Protocol
Port 80
Unsecured web browsing

Question 17

POP3

Answer 17

Post Office Protocol v3
Port 110
Downloading email

Question 18

NTP

Answer 18

Networking Time Protocol
Port 123
Clock synchronization between computer systems

Question 19

NetBIOS

Answer 19

Network Basic Input/Output System
Port 139
File and printer sharing over LAN

Question 20

IMAP

Answer 20

Internet Mail Application
Port 143
Retrieve email over TCP/IP connection

Question 21

SNMP

Answer 21

Simple Network Management Protocol
Port 161
Collection and organization of information about managed devices on IP networks

Question 22

LDAP

Answer 22

Lightweight Directory Access Protocol
Port 389
Accessing and maintaining distributed directory of information services

Question 23

HTTPS

Answer 23

HTTP Secure
Port 443
Adds security to HTTP using TLS or SSL

Question 24

SMB

Answer 24

Server Message Block
Port 445
Shared access to files, printers, and miscellaneous communication between devices on a network

Question 25

LDAPS

Answer 25

LDAP Secure
Port 636
LDAP secured using TLS or SSL

Question 26

RDP

Answer 26

Remote Desktop Protocol
Port 3389
Microsoft remote access

Question 27

SIP

Answer 27

Session Initiation Protocol
Port 5060, 5061
Signaling and controlling multimedia communication sessions in applications

Question 28

SFTP

Answer 28

SSH File Transfer Protocol
Port 22
Secure FTP

Question 29

OSI to TCP/IP levels

Answer 29

OSI TCP/IP
Application Application
Presentation
Sessions

Transport	Transport

Network	         Internet

Data link	         Network Interface 
Physical