Lisa Bock reviews ARP, which associates a hardware address with an IP. ARP is unique on a network because it is not routable, and doesn’t contain an IP header.
- [Narrator] Once on a local area network, the data link…layer uses an Ethernet frame that holds the MAC address…of the destination machine, rather than the IP address.…Here, we can see the local area network.…And a router needs an IP address, because a router…transfers data between networks.…Once in the local area network, we need a MAC address…because switches transfer data between computers.…When the MAC address is unknown,…an ARP broadcast is sent out.…
All hosts on the network will hear it.…An ARP request simply says,…who has this IP address, tell me.…It will ask over and over until it gets a resolution.…Address resolution protocol associates a hardware address…with an IP address only on a local network.…I've opened this webpage on CloudShark.…And here we have an ARP capture.…You can follow along if you like.…You may sign in and login and get an account.…I'm just going in as guest.…
There's a couple other packets here.…We see ICMP.…But to put in a display filter,…I'll simply type ARP and Apply.…I'll give myself a little more landscape here so…
Note: The topics in this course will prepare you for key objectives on the Certified Ethical Hacker exam. Find an overview of the certification and the exam handbook at https://www.eccouncil.org/programs/certified-ethical-hacker-ceh/.
- Sniffing network traffic
- Passive vs. active attacks
- Comparing IPv4 to IPv6
- MAC and macof attacks
- Investigating DHCP attacks
- Detecting ARP and DNS spoofing
- Sniffing tools and techniques
Skill Level Beginner
1. Sniffing Overview
2. MAC Attacks
6. Sniffing Tools and Techniques
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