Question

System Administration Linux/Unix

This lab is for you to research and implement old school DNS for your virtualized environment

Currently, if you tried to ping your server01 by IP address (192.168.10.11), you would receive a response. If you tried to ping using its hostname "server01", it would result in "ping: hostname: Temporary failure in name resolution"

1) Research how and where to implement

2) Create the following entries:

192.168.10.1 router

192.168.10.11 SRV1

192.168.10.12 SRV2

192.168.10.13 client

3) Ensure these hostnames work from each VM and verify with screenshot(s).

A screenshot from each VM (except the router) should show the result of

ping router

ping srv1

ping srv2

ping client

Answer 1

As given in the question if you ping any server machine by IP address then it work but if you try by giving hostname then you get error.
We are getting this error because server name is missing from host file. Important thing to note here is, The hosts file is a plain text file that all operating systems use to translate hostnames into IP addresses. Even windows use the same file.
This answers your first question.

Answer for Question 1) Research how and where to implement : you need to add entry in host file.

On Linux, you can find the hosts file under : /etc/hosts
This is simple text file you can open it using any text editor but you may need permission to change this file and to save these changes.

In this hosts file, each entry has its own line. The syntax is : "IP address" hostname
Type the IP address, press the tab key or even space is fine, and then type the hostname.

Answer for Question 2) in this question you need to create entry for hostname router, SRV1, SRV2, client
here open that host file and add following entries.

192.168.10.1 router

192.168.10.11 SRV1

192.168.10.12 SRV2

192.168.10.13 client

Answer for Question 3) Ensure these hostnames work from each VM and verify with screenshot(s).
We don't have these IP setup so you need to add above entries in each VM then only you can see the result. The commands that are given in the question ping router, ping srv1, ping srv2, ping client
will only work on your lab machine because of these IP addresses.