Atelier de Conception des Réseaux de Campus
Dakar, Senegal
2 au 9 Avril, 2011

EXAMEN
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1.) The recommendation for campus network routing/switching architecture is:

    a. To have one large subnet covering the entire campus and only route
       between the Internet and the one campus subnet.
    b. To have one subnet per reasonable sized building and route in the core 
       of your network.
    c. To not route at all.

2.) The type of optical fiber that will provide service over the longest
    distance is:

    a. Multi Mode 62.5 micron OM1
    b. Multi Mode 50 micron OM2
    c. Multi Mode 50 micron OM3
    d. Multi Mode 50 micron OM4
    e. Single mode fiber G.652.D

3.) A campus networking best practices recommendation is to:

    a. Cascade switches as deep as required to reach the farthest building
       on your campus
    b. Build star networks to reduce the amount of cascading as much as
       possible

4.) Can the member of one VLAN see the traffic from another VLAN even if the
    VLANs are on the same physical switch?

    a. Yes
    b. No 

5.) Is it a good idea to use VLANs to extend the same IP network over multiple
    building in your campus network?

    a. Yes
    b. No




6.) When using OSPF among routers does:

    a. every router get designated as a DR (Designated Router) or BDR (Backup
       Designated router)?
    b. one router is the DR, one is the BDR and remaining routers maintain a
       2-way state between themselves?
    c. the Designated Router (DR) only share information with the BDR (Backup
       Designated Router).

7.) What is Spanning Tree used for?

    a. To create a diagram of the network topology
    b. To prevent loops in a switched network
    c. To update the routing table in a router

8.) How can we avoid using static routes to reach all subnets in our
    campus network?

    a. Use BGP
    b. Remove all subnets and build a flat layer 2 network
    c. Use an IGP like OSPF or IS-IS

9.) What does a "passive" interface do in a router with OSPF?

    a. It removes the interface's subnets from the OSPF database
    b. It disables the interface
    c. It prevents the router from becoming adjacent to another OSPF router
       via that interface

10.) What is the LOCAL_PREF attribute used for in BGP?

     a. To influence the path taken by our egress (outgoing) traffic
     b. To influence the selection of the designated router (DR)
     c. To receive all incoming traffic through one router interface

11.) Would it be OK to use a switch in your network core that does not support
     SNMP?

     a. Yes
     b. No






12.) What is the concept of baselining?

     a. Discovering the speed of every device in your network.
     b. Discovering your network topology.
     c. Collecting data about your network performance and activity for a
        period of time to understand what is typical activity on your network.
     d. Scanning servers on your network for viruses.
     e. Determining how many servers and what operating systems are in use on  
        your network.

13.) Why is it important to understand what network traffic is leaving
     (egress) your network?

     a. It's not. As long as I have the capacity I don't need to worry about 
        what network traffic is coming from my network.
     b. To be able to apply proper filtering and pro-actively block and fix
        compromised machines on my network to act as a good network citizen, 
        and to avoid having your network, potentially, blacklisted by others.
     c. To be able to use Netflow to draw pretty graphs of the data flowing 
        across my border routers.