ICS 156: Lecture 2 (part 2). Data link layer protocols Address resolution protocol Notes on lab 2. TCP/IP Protocol Stack. The TCP/IP protocol stack runs on top of multiple data link layers. Two data link layer technologies Broadcast Point-to-Point. Data Link Layer.
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Data link layer protocols
Address resolution protocol
Notes on lab 2
Ring LANLocal Area Networks
Higher layer issues
ARP Request: Argon broadcasts an ARP request to all stations on the network: “What is the hardware address of 220.127.116.11?”
ARP Reply: Router 137 responds with an ARP Reply which contains the hardware address
Source hardware address: 00:a0:24:71:e4:44Source protocol address: 18.104.22.168Target hardware address: 00:00:00:00:00:00Target protocol address: 22.214.171.124
Source hardware address: 00:e0:f9:23:a8:20 Source protocol address: 126.96.36.199 Target hardware address: 00:a0:24:71:e4:44Target protocol address: 188.8.131.52
(184.108.40.206) at 00:10:4B:C5:D1:15 [ether] on eth0
(220.127.116.11) at 00:B0:D0:E1:17:D5 [ether] on eth0
(18.104.22.168) at 00:B0:D0:DE:70:E6 [ether] on eth0
(22.214.171.124) at 00:05:3C:06:27:35 [ether] on eth1
(126.96.36.199) at 00:B0:D0:E1:17:DB [ether] on eth0
(188.8.131.52) at 00:B0:D0:E1:17:DF [ether] on eth0
Several ARP requests are made with increasing time intervals between requests. Eventually, ARP gives up.
Typical exploitation of these vulnerabilities: