Fundamentals

Question 1

What is line vty 0 4 used for?

Answer 1

controls settings for Telnet and SSH connections to router.

Question 2

What does Show Host show you on router?

Answer 2

list all host names known to the local router.

Question 3

What does show spanning-tree root show you

Answer 3

shows you all the vlans on the switch and the port that they are coming from. All should show same MAC

Question 4

WHAT IS LLDP?

What Layer does it run on?

Answer 4

LLDP is a neighbor discovery protocol that is used for network devices to advertise information about themselves to other devices on the network. This protocol runs over the data-link layer, which allows two systems running different network layer protocols to learn about each other.

Question 5

What is DNS?

What Port does it work in?

Answer 5

Domain Name System - is a database that contains information of every site on the internet. Gives you IP to name and vice versa of URL.

Works in the application layer and it uses port 53 on the transport layer

Question 6

What does Prefix mean?

Answer 6

Another way to say subnet

Question 7

What are the ranges for private IP addresses?

Also what are their subnet mask?

Answer 7

Class A - 10.0.0.1 - 10.255.255.254 / 255.0.0.0

Class B - 172.16.0.1 - 172.31.255.254 / 255.240.0.0

Class C- 192.168.0.1 - 192.168.255.254 / 255.255.0.0