Section 50 – Review 8

Section 50 Tasks

  • Take the exam below
  • Complete the challenge lab
  • Review the subjects 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 50 Exam

  1. Can a router in Area 0 running OSPF process ID 2 swap LSAs with a router in Area 0 running OSPF process ID 10?
  2. What is the port cost for a FastEthernet interface in STP? What about for a 1Gigabit interface?
  3. What is the difference between the enable secret cisco command and the enable password cisco command?
  4. List the seven Cisco enhancements to STP.
  5. Name the three LMI Frame Relay encapsulation types.
  6. What does a DLCI do?
  7. Is it true that the DLCI number must be the same across the entire Frame Relay circuit?

Section 50 Answers

  1. Yes. The OSPF process-id configuration is only locally significant.
  2. For FastEthernet, it is 19; for 1Gigabit, it is 4.
  3. The enable secret cisco command is encrypted with MD5.
  4. Port Fast, BPDU Guard, BPDU Filter, Loop Guard, Root Guard, Uplink Fast, and Backbone Fast.
  5. CISCO, ANSI, and Q933a.
  6. Identifies (tags) a connection with a Frame Relay switch.
  7. No, it is locally significant only.

Section 50 Lab – EIGRP with PPP and ACL



Connect two routers together with a serial or crossover cable:

  1. Add IP addresses to the routers and a Loopback interface on Router A and Router B, according to the diagram
  2. Ping between Router A and Router B to test the serial lines (remember clock rates)
  3. Now set the serial lines to use PPP but with no authentication required
  4. Configure EIGRP on both routers; add wildcard masks and turn off auto summary
  5. Check the routing table and ping all IP addresses
  6. Configure an extended ACL on Router A
  7. Block Telnet traffic to the router, unless destined for the subnet
  8. Configure Telnet access on the VTY lines for Router A, and do a login and password under the VTY line (not username and password)
  9. Test the ACL by Telnetting to (the IP address for Loopback0) from Router B
  10. Test that it works by Telnetting to

Solution Hints and Commands

  • Use the router eigrp x command to enter EIGRP Configuration mode
  • Use the show ip route command to verify the IP routing table
  • Use the line vty 0 4 command to enter Line Configuration mode
  • Use the access-class command under the VTY line to filter Telnet sources


Inline Feedbacks
View all comments
Would love your thoughts, please comment.x