NETWORKING LAB ICT OFFICER Interview Questions and Answers

(Hands-On Networking Commands with Screenshots & Explanations)

Lab Task Objectives

1. Demonstrate proficiency in basic networking commands (ipconfig, nslookup, ping, tracert, arp, route).

2. Capture screenshots of command outputs with explanations.

3. Show practical understanding of IP configuration, DNS lookup, network diagnostics, and routing.

Task 1: ipconfig Command

1.1. ipconfig /?

Command:

ipconfig /?

Screenshot: (Example Output)
https://i.imgur.com/xyz123.png

Explanation:

• Displays help for all ipconfig subcommands.

• Lists options like /all, /release, /renew, etc.

1.2. Five ipconfig Subcommands

(1) ipconfig /all

Command:

ipconfig /all

Explanation:

• Shows detailed network configuration (IP, MAC, DHCP, DNS).

(2) ipconfig /release

Command:

ipconfig /release

Explanation:

• Releases the current IP address (useful before renewing).

(3) ipconfig /renew

Command:

ipconfig /renew

Explanation:

• Requests a new IP address from DHCP.

(4) ipconfig /flushdns

Command:

ipconfig /flushdns

Explanation:

• Clears the DNS cache to resolve outdated records.

(5) ipconfig /displaydns

Command:

ipconfig /displaydns

Explanation:

• Shows cached DNS entries (useful for troubleshooting).

Task 2: nslookup Command

2.1. nslookup [Domain]

Command:

nslookup google.com

Screenshot: (Example Output)
https://i.imgur.com/abc456.png

Explanation:

• Queries DNS to find IP addresses of google.com.

2.2. nslookup [Public IP]

Command:

nslookup 8.8.8.8

Explanation:

• Performs reverse DNS lookup to find the domain linked to 8.8.8.8 (Google DNS).

Task 3: ping Command

3.1. ping /?

Command:

ping /?

Explanation:

• Lists all ping options (e.g., -t, -n, -l).

3.2. Two ping Subcommands

(1) `ping -t [Domain]

Command:

ping -t google.com

Explanation:

• Continuous ping (press Ctrl+C to stop).

(2) ping -n 5 [Domain]

Command:

ping -n 5 google.com

Explanation:

• Sends 5 packets (default is 4).

Task 4: tracert Command

4.1. `tracert [3 Domains]

Commands:

tracert google.com  
tracert facebook.com  
tracert youtube.com

Explanation:

• Traces the network path (hops) to each domain.

Task 5: arp Command

5.1. arp /?

Command:

arp /?

Explanation:

• Displays ARP (Address Resolution Protocol) options.

5.2. Three arp Subcommands

(1) arp -a

Command:

arp -a

Explanation:

• Lists ARP cache (IP-to-MAC mappings).

(2) arp -d

Command:

arp -d

Explanation:

• Deletes all ARP entries (requires admin rights).

(3) arp -s [IP] [MAC]

Command:

arp -s 192.168.1.1 00-1a-2b-3c-4d-5e

Explanation:

• Adds a static ARP entry.

Task 6: route Command

6.1. Add Static Route

Command:

route add 41.78.65.240 MASK 255.255.255.0 192.168.3.2

Explanation:

• Adds a route to 41.78.65.240 via gateway 192.168.3.2.

Key Notes for Lab Submission

✔ Capture screenshots of all commands (use Snipping Tool).
✔ Label each screenshot (e.g., "Figure 1: ipconfig /all").
✔ Explain outputs in 1-2 sentences.