Introducing LAN Topologies

What does LAN stand for?

Local Area Network

What is the verb given to the job that Routers perform?

Routing

What device is used to centrally connect multiple devices on the local network and transmit data to the correct location?

Switch

What topology is cost-efficient to set up?

Bus Topology

What topology is expensive to set up and maintain?

Star Topology

Complete the interactive lab attached to this task. What is the flag given at the end?

Deploy the lab by clicking on the "View Site"-button. Read the instructions and continue until you reach the task to disturb the ring topology. Click on one of the cables to cut it. After cutting the cable the packets will stop circling and you can continue.

Continue by reading the information and advancing through the task when you reach the end of the bus topology you are given a tool to send packets between two computers. You can break the network by spam-sending packets through it. Just select the option to send packets from computer1 to computer1 and spam the "send packet"-button until the network stops working and you can continue.

Continue by reading the information and advancing the task (just like before). If you reach the task to stop the star topology click on the switch to smash it with the hammer, continue and you will get the flag for completing the task:

THM{TOPOLOGY_FLAWS}

A Primer on Subnetting

What is the technical term for dividing a network up into smaller pieces?

Sbunetting

How many bits are in a subnet mask?

We have 4 Octets. Therefore we have 4 * 8 bit: 32

What is the range of a section (octet) of a subnet mask?

With 8 bits in an octet we can display 2^8 different numbers. The range is: 0-255

What address is used to identify the start of a network?

Network Address

What address is used to identify devices within a network?

Host Address

What is the name used to identify the device responsible for sending data to another network?

Default Gateway

The ARP Protocol

What does ARP stand for?

Address Resolution Protocol

What category of ARP Packet asks a device whether or not it has a specific IP address?

Request

What address is used as a physical identifier for a device on a network?

MAC Address

What address is used as a logical identifier for a device on a network?

IP Address

The DHCP Protocol

What type of DHCP packet is used by a device to retrieve an IP address?

DHCP Discover

What type of DHCP packet does a device send once it has been offered an IP address by the DHCP server?

DHCP Request

Finally, what is the last DHCP packet that is sent to a device from a DHCP server?

DHCP ACK

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