Reference no: EM132389332 , Length: 12 Pages

Routing Review Questions -

1. What is routing?

2. LANs use broadcasting to ensure that data reaches its destination. Why is it not advisable to use broadcasting between LANs?

3. What are routers? Find three carrier-grade router models made by the major vendors. What is the range of list prices on these routers?

4. What are the important similarities between switching and routing?

5. What are the important differences between routing and switching?

6. Consider a router at the interface of two networks; say your university and its ISP. Draw a figure showing the IP addresses of the two interfaces of the router and the CIDR address blocks of the two networks. (You may need to use tracert to obtain the IP addresses at the two interfaces and arin.net to obtain the address blocks of the two networks.)

7. What is an autonomous system?

8. How are post offices like autonomous systems?

9. Briefly describe how routing works.

10. What is a routing table? What information is stored in a routing table?

11. One route from the routing table at the Route Views project is shown below. What does each term in the route indicate?

128.210.0.0/16            194.85.4.55         0            3277 3267 9002 11537 19782 17 i

12. Use the AS numbers website to find the names of all the autonomous systems referred to in Question 11.

13. What is a routing metric? How is the routing metric used to select the path when multiple paths are available?

14. Use the tracert utility to record the route from your home computer to your university's home page.

15. What are routing protocols?

16. What are the two kinds of routing protocols? Give an example of each of the two kinds of routing protocols.

17. Provide an overview of how exterior routing protocols work.

18. What is route aggregation?

19. Why is route aggregation useful?

20. Give an example of routes before and after route aggregation.

21. What is software defined networking? Where is it most useful?

22. What is MPLS?

23. What is the motivation for the development of MPLS?

24. What is a label in MPLS? Where is the label attached to a packet? Where is it removed?

25. What is a forwarding equivalence class (FEC) in MPLS? Give an example of two packets that may be assigned the same FEC even though they are addressed to two destinations.

Hands-on exercise -

1. Write a brief summary of the goals of the Route Views project from the project home page.

2. What is the network ID of the network to which your university belongs? (In some states, university networks are part of larger state networks).

3. Show a screenshot (similar to the figure) of the BGPlay query results for your university's network.

4. Pick a route originating from your university that passes through at least three autonomous systems. Write the route as a sequence of ASes (e.g., 2905 701 1239 19151 3851).

5. What are the network names of the ASes selected above?

6. Pause BGPlay during a route announcement. Show a screenshot as shown in the figure. What is the new route added?

7. Pause BGPlay during a route withdrawal. Show a screenshot as shown in the figure. What is the route withdrawn?

Critical thinking exercise -

Please look at the references in the chapter before you begin responding to this section

1. What would be some motivations for governments (or other institutions in positions of authority) to block internet access.

IT infrastructure design exercise -

1. To connect to the other locations, TrendyWidgets needs border routers at each location. Update the network diagram from chapter 8 to include a border router at each of the four locations.

2. If you haven't already done so in chapter 7, update your network diagram so that the Internet connection from Tampa goes through the border router at Tampa.

3. Each location uses Ethernet to connect the various devices at the location to each other and to the Internet through the border router. Update the diagram to show an Ethernet at each location. Connect the DHCP server at each location to the Ethernet. Also, connect the Ethernet to the border router.

4. A consultant suggested that you run the following commands. Lookup the documentation to the route command and describe what these commands do, and how they could be useful to you (make reasonable assumptions about the identities of router-net1 and router-net2)

route add host 192.168.1.2 router-net2 1

route add host 192.168.1.3 router-net1 1

Example case questions -

1. Describe some of the damage caused to communications networks due to Hurricane Katrina.

2. Describe some of the damage caused to communications networks on 9/11.

3. Why is text messaging and VoIP more reliable than circuit-switched voice networks?

4. Name some leading Voice-over-IP service providers in the country. Compare their services - pricing, equipment required, etc.

5. What are content delivery networks? How are they useful during disasters?

6. View the statistics on the nyiix website. What is the busiest time of day for Internet traffic? Why do you think traffic peaks at this time?

7. What were some changes in Internet traffic patterns on 9/11?

8. Why is it useful to reduce the size of a web page so it fits into one IP packet?

9. What is a possible extreme disaster that is likely to strike your city? Create a disaster continuity plan for communication that will allow you to maintain communication with the two most important people in your life in case this disaster strikes your town. If you wish to maintain the privacy of these individuals, just call them A and B, or use other such anonymous names.

Attachment:- Routing Review Questions.rar