Learn About Cisco Certified Network Associate Exam

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The options 100 – 199, 2000 – 2699 and 1200 – 1299 are incorrect because these are not the valid ranges of access list numbers on a Cisco router for an Internet Protocol (IP) standard access list.

References:

Cisco > Cisco IOS Security Configuration Guide, Release 12.4 > Part 3: Traffic Filtering, Firewalls, and Virus Detection > Access Control Lists: Overview and Guidelines

Objective: Implement and verify WAN links.
Sub-objective: Configure and verify Frame Relay on Cisco routers.

Single answer, multiple-choice

Which “show” command can you use to display the status of each configured connection, traffic statistics and the number of Backward Explicit Congestion Notification (BECN) and Forward Explicit Congestion Notification (FECN) packets received by the router?

A. Show frame-relay lmi.
B. Show frame-relay pvc.
C. Show frame-relay map.
D. Show interfaces serial.

Answer:
B

Tutorial:
The show frame-relay pvc command displays the status of each configured connection, as well as traffic statistics. You can also view the number of BECN and FECN packets received by the router. This command also displays whether the interface is a Data Terminal Equipment (DTE) or Data Communications Equipment (DCE), the Data-link Connection Identifier (DLCI) number, the usage of the DLCI, status of the Permanent Virtual Circuit (PVC) and the interface of the PVC.

The show frame-relay lmi command displays LMI traffic statistics, such as LMI type, on the interface and the number of status messages between the router and the Frame Relay switch. In addition, it displays whether the interface is a DTE or DCE. It does not show BECN and FECN statistics.

The show frame-relay map command displays the network layer address and associated DLCI for each remote destination. This command displays the static mappings, as well as mappings learned from inverse ARP. It does not show BECN and FECN statistics.

The show interfaces serial command displays information about encapsulation, LMI and DLCI used for local management. It will display the encapsulation as Frame Relay, the keepalive interval, the DLCI number, the LMI type, the network address, the Maximum Transmission Unit (MTU), the bandwidth and the queuing strategy. In addition, it will display whether the line and protocol are on the interface, whether the loopback is set and whether the interface is a DTE or DCE. It does not show BECN and FECN statistics.

References:

Cisco > Cisco IOS Wide-Area Networking Command Reference > sequencing through show mpls l2transport vc