Core Protocol

Question 1

TCP Port 22
Encrypted session
Replaces protocols like Telnet
SSH v2 should be used over v1
allow for command line access to network

Answer 1

SSH (Secure Shell)

Question 2

TCP Port 23
clear text/plaintext
even passwords
Should be disabled for best practice
anyone can sniff your traffic
allow for command-line access to a network

Answer 2

Telnet (not secure like SSH)

Question 3

Pinging is used with this protocol
Allows us to check IP connectivity to any network node with applications like Ping and Traceroute
192.168.10.1 client pinging - echo request 192.168.10.1 router - echo reply back to the client
Does not have a Port Number
Works on Layer 3
Not in Layer 4
Has ~40 type fields
Ping uses Echo Request and Echo Reply
Traceroute also uses ICMP
Many organizations block ICMP on the outside

Answer 3

ICMP (Internet Control Message Protocol)

Question 4

Connection-oriented
Retrieve files from an FTP Server across the network and over the internet as well
Used to transfer files to routers, switches, firewalls, servers & hosts
FTP Client – switch – FTP Server

Answer 4

FTP (File Transfer Protocol) TCP Ports 20 & 21

Question 5

A simple version of FTP that uses UDP (Port 69) as the transport protocol, and does not require a logon to the remote host
Connection-less

Answer 5

TFTP (Trivial File Transfer Protocol) UDP Port 69