The ------- layer decides the location of synchronization points.

presentation

transport

application

session

We need to upgrade a channel to a higher bandwidth. How is the rate improved if we double the bandwidth?

		data rate is quadrupled
		None of the above
		data rate is doubled
		data rate remains the same

---------- routers 1. block spam and monitor networks to keep the free from attacks 2. Routers keep lists that need frequent updates of sites used to launch attacks. 3. They can shut off residential customers who unknowingly download a worm and can send the customers to an Internet site that explains what has occurred and how to fix their computer so that it does not infect the carriers network.

switches

layer 2 switches

core routers

edge routers

Suppose a computer sends a packet at the network layer to another computer somewhere in the internet. The logical destination address of the packet is corrupted. What happens to the packet?

		None of the above
		Packet accepted
		All of the above
		Packet discarded