1. What is used to identify the path to the next Frame Relay switch in a Frame Relay network?
2. Why are Frame Relay paths referred to as virtual?
- There are no dedicated circuits to and from the Frame Relay carrier.
- Frame Relay PVCs are created and discarded on demand.
- The connections between PVC endpoints act like dialup circuits.
- There are no dedicated circuits inside the Frame Relay carrier cloud.
3. Which statement accurately describes the split-horizon problem with regard to a multipoint topology?
- Split horizon must be disabled for all non-IP protocols.
- Split horizon creates IP routing loops in multipoint domains.
- Split horizon does not apply to broadcasts, so it does not protect protocols that use broadcast updates.
- Split horizon prevents any interface from accepting a valid update and forwarding to all the other interfaces.
4. Why is Frame Relay more cost-effective than leased lines? (Choose two.)
- Time division multiplexing
- It uses less equipment.
- Optimized packet routing
- It shares bandwidth across a large customer base.
- Dynamic IP addressing
5. Match each status from the show frame-relay pvc command with its meaning:
A. The DLCI is programmed in the Frame Relay switch, but the other end of the PVC may be down.
B. The DLCI does not exist on the router.
C. The DLCI is programmed in the Frame Relay switch and is usable.
D. The DLCI does not exist on the Frame Relay switch for this router.
E. The DLCI is programmed on the other end of the PVC for this router.
6. What reliability advantage does Frame Relay offer over leased lines?
- Frame Relay access circuits are higher-grade circuits than leased lines.
- The pathways for virtual circuits inside the carrier are meshed.
- From end to end, a single virtual circuit uses a fixed error-checked path.
- Frame Relay uses more-sophisticated error-detection methods.
7. Refer to the exhibit. What is placed in the Address field of a frame that will travel from the Orlando office to the DC office?
- MAC address of the Orlando router
- MAC address of the DC router
- DLCI 100
- DLCI 200
8. Which situation favors a multipoint topology over point-to-point?
- When VLSM cannot be used to conserve addresses
- When using routing protocols other than IP
- When using a frame mesh topology to save access circuits
- When using a routing protocol that requires broadcast updates
9. What is an advantage of configuring subinterfaces in a Frame Relay environment?
- It makes the DLCIs globally significant.
- It eliminates the need for using Inverse ARP.
- It solves split-horizon issues.
- It improves flow control and bandwidth usage.
10. Which protocol can provide error correction for data that is transmitted over a Frame Relay link?
11. Match each command with its description:
show frame-relay lmi
show frame-relay pvc
show frame-relay map
debug frame-relay lmi
A. Shows the status of the virtual circuit and FECN/BECN statistics
B. Verifies that the router and Frame Relay switch are sending and receiving LMI packets properly
C. Verifies encapsulation, LMI type, LMI DLCI, and LMI status
D. Verifies LMI statistics
E. Verifies the destination IP address mapping to the DLCI
12. At which rate does a service provider guarantee to transfer data into the Frame Relay network?
- Baud rate
- Timing rate
- Data transfer rate
- Committed information rate
13. How are DLCI numbers assigned?
- They are assigned by a DLCI server.
- They are assigned arbitrarily by the user.
- They are assigned by the service provider.
- They are assigned based on the host IP address.
14. A router can reach multiple networks through a Frame Relay interface. How does the router know which DLCI to assign to the IP address of the destination network?
- It consults the Frame Relay map.
- It consults the routing table to find the DLCI.
- It uses Frame Relay switching tables to map DLCIs to IP addresses.
- It uses RARP to find the IP address of the corresponding DLCI.
15. Match each term with its definition:
A. A bit that marks the frame to be dropped when congestion is present
B. A bit set on every frame that a switch places on a congested link
C. The rate at which the service provider agrees to accept bits on the VC
D. A bit set on every frame that a switch receives on a congested link
16. Compare and contrast the following terms: DLCI, LMI, and Inverse ARP.
17. Refer to the exhibit. The following configuration is for router R1: What command on R1 is required to statically configure a Frame Relay connection to R2? Traffic between sites must also support OSPF. 18. Compare and contrast the following terms: access rate, CIR, CBIR, and BE. 19. Refer to the exhibit and the following configuration. R1 cannot establish connectivity with the routers over the Frame Relay cloud. What are the problems with this configuration?
ip address 10.1.1.1 255.255.255.252
interface s0/0/1.201 point-to-point
ip address 10.1.1.1 255.255.255.0
frame-relay interface-dlci 201
interface s0/0/1.301 point-to-point
ip address 10.3.3.1 255.255.255.0
frame-relay interface-dlci 301
17. Refer to the exhibit.
The following configuration is for router R1:
What command on R1 is required to statically configure a Frame Relay connection to R2? Traffic between sites must also support OSPF.
18. Compare and contrast the following terms: access rate, CIR, CBIR, and BE.
19. Refer to the exhibit and the following configuration. R1 cannot establish connectivity with the routers over the Frame Relay cloud. What are the problems with this configuration?