Section 53 – Review 11

Section 53 Tasks

  • Take the exam below
  • Complete the challenge lab
  • Review the subject of your choice
  • Read the ICND2 cram guide (and the ICND1 cram guide, if taking the CCNA exam)
  • Spend 15 minutes on the website

Section 53 Exam

  1. Write out the syntax for standard, extended, and named ACLs, and how to apply them to interfaces and the VTY line.
  2. OSPF operates over IP protocol _______.
  3. OSPF does NOT support VLSM. True or false?
  4. Any router which connects to Area 0 and another area is referred to as an _______ _______ router or _______.
  5. If you have a DR, you must always have a BDR. True or false?
  6. The DR/BDR election is based upon which two factors?
  7. By default, all routers have a default priority value of _______. This value can be adjusted using the _______ _______ _______ <0-255> interface configuration command.
  8. When determining the OSPF router ID, Cisco IOS selects the highest IP address of configured Loopback interfaces. True or false?
  9. What roles do the DR and the BDR carry out?
  10. Which command would put network into Area 0 on a router?

Section 53 Answers

  1. Standard ACL: access-list x permit host y.y.y.y or access-list x permit x.x.x.x x.x.x.x
    Exnteded ACL: access-list x permit/deny {service/protocol} {source network/IP} {destination network/IP} {port#}
    Named ACL:
    Ip access-list extended NAME
    Permit x.x.x.x x.x.x.x
    Deny x.x.x.x x.x.x.x
    Apply ACLs: ip access-group x inside/outside on interface, access-class class x in/out on vty line
  2. 89.
  3. False.
  4. Area Border or ABR.
  5. False.
  6. The highest router priority and the highest router ID.
  7. 1, ip ospf priority.
  8. True.
  9. To reduce the number of adjacencies required on the segment, to advertise the routers on the Multi-Access segment, and to ensure that updates are sent to all routers on the segment.
  10. The network area 0 command.

Section 53 Lab – EIGRP and ACL



Connect three routers together with a serial or crossover cable:

  1. Add IP addresses to the routers and Loopback interfaces on Routers A, B, and C, according to the diagram
  2. Ping between Routers A and B and between Routers B and C to test the serial lines (remember clock rates)
  3. Now set the serial lines to use PPP with CHAP (also set usernames and passwords)
  4. Configure EIGRP 40 on all routers
  5. Check the routing tables and make sure that you include both of the 192.168.1.x networks
  6. Set an ACL to Router A; Telnet should be permitted from the Router C Serial address, but not from Router B; permit Telnet on Router A first, of course

Solution Hints and Commands

  • router eigrp 40
  • Use the network command to advertise the network in EIGRP
  • Use the access-class command on VTY lines to filter traffic
  • NOTE: The two networks on Router B are and


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