TCP/IP

Question 1

netstat command (switches): -a, -b, -n, -o, -r
Displays protocol statistics and current TCP/IP network connections
which protocol is associated with what port
Good trouble shooting command

Answer 1

Win/Mac/Linux

Question 2

Process ID: identifies what application or services you are using such as: firefox/google or software like packet tracer/acrobat adobe.

Answer 2

PID

Question 3

Scan a network for IP addresses and open ports

Angry IP Scanner you can use a range

Answer 3

NMAP & Angry IP Scanner

Question 4

command: show tcp brief

Answer 4

Cisco Router IOS