2.5 – What is a Loopback Address

Question 1

Loopback Address

Answer 1

• Already assigned to machine
  * Basically represents you
• Used for host to communicate with itself
• Your OWN IP address

Question 2

Loopback Address: IP Address

Answer 2

IP address =

127.0.0.0 – 127.255.255.255

Question 3

Why use a loopback?

Answer 3

• Everything that uses an IP address ALREADY has a loopback address [in the TCP stack]
• Using 127 address
• installed software wants to talk with internal software
• IF CHANGE IP address on NIC card then software has to be reconfigured

Question 4

Local Host

Answer 4

YOUR own computer talking to itself