Protocols and Port Numbers

Question 1

FTP

Answer 1

File Transfer Protocol - 21 (TCP)

Question 2

SSH

Answer 2

Secure Shell - 22 (TCP)

Question 3

Telnet

Answer 3

Telnet - 23 (TCP)

Question 4

SMTP

Answer 4

Simple Mail Transfer Protocol - 25 (TCP)

Question 5

DNS

Answer 5

Domain Name System - 53 (TCP/UDP)

Question 6

DHCP

Answer 6

Dynamic Host Configuration Protocol - 67/78 (UDP)

Question 7

TFTP

Answer 7

Trivial File Transfer Protocol - 69 (UDP)

Question 8

HTTP

Answer 8

Hypertext Transfer Protocol - 80 (TCP)

Question 9

POP3

Answer 9

Post Office Protocol v3 - 110 (TCP)

Question 10

NTP

Answer 10

Network Time Protocl - 123 (UDP)

Question 11

NetBIOS

Answer 11

NetBIOS - 137,138,139 (TCP/UDP)

Not protocol in itself, it is a layer 5 protocol utilized with IP

Question 12

IMAP

Answer 12

Internet Message Access Protocol - 143 (TCP)

Question 13

SNMP

Answer 13

Simple Network Management Protcol v1-3 - 161,162 (TCP/UDP)

Question 14

BGP

Answer 14

Border Gateway Protocol v4 - 179 (TCP)

Question 15

LDAP

Answer 15

Lightweight Directory Access Protocol - 389 (TCP/UDP)

Question 16

HTTPS

Answer 16

Hypertext Transfer Protocol over SSL/TLS - 443 (TCP)

Question 17

OSPF

Answer 17

Open Shortest Path First - NON TCP/UDP (Layer 2)

uses Protocol number 89 in the IP Protocol Field

Question 18

ARP

Answer 18

Address Resolution Protocol - NON TCP/UDP (Layer 2)

Uses Protocol Number 0x0800 in the ethernet frame pType Field. Correlates MAC address to IP address