In this walkthrough, we will be covering Intro to LAN room from Tryhackme. It is an introductory room covering the basics of Local Area Network. So, let’s get started.
Today we will cover the following topics in this room:
- Introduction LAN Topologies
- A Primer on Subnetting
- The ARP Protocol
- The DHCP Protocol
Task 1 – Introducing LAN Topologies
Question 1 – What does LAN stand for?
Local Area Network
Question 2 – What is the verb given to the job that Routers perform?
Routing
Question 3 – What device is used to centrally connect multiple devices on the local network and transmit data to the correct location?
Switch
Question 4 – What topology is cost-efficient to set up?
Bus Topology
Question 5 – What topology is expensive to set up and maintain?
Star Topology
Question 6 – Complete the interactive lab attached to this task. What is the flag given at the end?
THM{TOPOLOGY_FLAWS}
Task 2 – A Primer on Subnetting
Question 1 – What is the technical term for dividing a network up into smaller pieces?
Subnetting
Question 2 – How many bits are in a subnet mask?
32
Question 3 – What is the range of a section (octet) of a subnet mask?
0-255
Question 4 – What address is used to identify the start of a network?
Network Address
Question 5 – What address is used to identify devices within a network?
Host Address
Question 6 – What is the name used to identify the device responsible for sending data to another network?
Default Gateway
Task 3 – The ARP Protocol
Question 1 – What does ARP stand for?
Address Resolution Protocol
Question 2 – What category of ARP Packet asks a device whether or not it has a specific IP address?
Request
Question 3 – What address is used as a physical identifier for a device on a network?
MAC Address
Question 4 – What address is used as a logical identifier for a device on a network?
IP Address
Task 4 – The DHCP Protocol
Question 1 – What type of DHCP packet is used by a device to retrieve an IP address?
DHCP Discover
Question 2 – What type of DHCP packet does a device send once it has been offered an IP address by the DHCP server?
DHCP Request
Question 3 – Finally, what is the last DHCP packet that is sent to a device from a DHCP server?
DHCP Ack
Task 5 – Continue Your Learning: OSI Model
Also Read: Tryhackme – Active Reconnaissance
So that was it. In this room, we learnt about different LAN topologies followed by a bit of Subnetting. Then, we goes behind the ARP Protocal and finished with the DHCP protocol. Post completing this room, we are ready with our local network basics that will help us in future engagements. On that note, i am out, till then “Hack the Planet”.
