U2.3 TCP, Routers, VLAN

1. connection oriented

1. connectionless

1. 1.1 receiving node puts entry in its connection-half-open table for sending node

1. 3.1 receiving node removes entry for sending node from its connection-half-open table

1. 1.Attacker sends many SYN packets to receiving node.
2. 2. Receiving node adds requests to half-open-connection table.
3. 3. Attacker does not send ACK packet.
4. 4. Receiving node's table gets full. Cannot process anymore connections.
5. IP source address can be spoofed for a more effective attack.

Attachments:

• U2.3 TCP, Routers - Router Diagram

1. 1. direct delivery of a packet to a directly connected device
2. 2. indirect delivery of a packet by forwarding the packet to a default router
3. 3. next-hop delivery of a packet over a known route by forwarding to the next hop router

1. subnets - VLANs set up on one switch