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How many address translations will occur? How many translations of protocol port numbers will occur?
Imagine that we decide to create a new Internet parallel to the existing Internet that allocates addresses from the same address space.
To answer the question, try to find a sequence of packets that a host can transmit to determine whether it is located behind a NAT box.
How many ATM cells are required to transfer a single ATMARP packet when each ATM address and sub address is 20 octets and each protocol address is 4 octets?
Is it possible to modify TCP to take advantage of cell ordering to reduce protocol overhead? Why or why not?
How many cells, octets, and bits can be present on a fiber that connects to an ATM switch if the fiber is 3 meters long? 100 meters? 3000 meters?
A typical remote login session using TCP generates datagrams of 41 octets: 20 octets of IP header, 20 octets of TCP header, and 1 octet of data.
ATM is a best-effort delivery system in which the hardware can discard cells if the network becomes congested.
Find an example of an internet in which the population of group members is sparse, but for which DVMRP is a better multicast routing protocol.
If your organization has an ATM switch or ATM service, find the technical and economic specifications, and then compare the cost of using ATM.
A typical connection between a host and a private ATM switch operates at 155 Mbps. Consider the speed of the bus on your favorite computer.
If IP fragments datagrams for an MTU of 9180 octets, what size fragments result from a datagram that carries a TCP segment of 16K octets? of 24K octets?
The data-driven multicast routing paradigm works best on local networks that have low delay and excess capacity, while the demand-driven paradigm.
If a given link has high probability of corruption, is it better to send redundant copies of a datagram or to send one copy that uses forward error-correcting.
Argue that only two types of multicast are practical in the Internet: statically configured commercial services that multicast to large numbers of subscribers.
Estimate the size of the multicast forwarding table needed to handle multicast of audio from 100 radio stations.
What ATM network topologies are appropriate for a two-level addressing scheme? Characterize situations for which additional levels of hierarchy are useful.
Read about the LANE and MPOA standards that allow ATM to emulate an Ethernet or other local area network.
A large organization that uses ATM to interconnect IP hosts must divide hosts into logical IP subnets.
Measure the throughput and delay of an ATM switch when using TCP. If your operating system permits, repeat the experiment with the TCP transmit.
Are there circumstances under which an SPF protocol can form routing loops? Hint: think of best-effort delivery.
Can you use ICMP redirect messages to pass routing information among interior routers? Why or why not?
Build an application program that sends a request to a router running RIP and displays the routes returned.
DVMRP was derived from RIP. Read RFC 1075 on DVMRP and compare the two protocols. How much more complex is DVMRP than RIP?
IGMP does not include a strategy for acknowledgement or retransmission, even when used on networks that use best-effort delivery.