Consider a redundant switched environment where some of the ports are blocked by running spanning tree on a switch. When are BPDUs sent out on blocked ports?

What does a CFI represent in 802.1q?

Click the Exhibit button. PE1 and PE2 are connected to the MPLS cloud. All MPLS labels from PE1 and PE2 are working. Observing the shown topology, will this scenario work?

A router is set to boot from flash, but cannot find boot commands in the configuration. Also, valid files do not exist in the default flash device. The router will:

Click the Exhibit button to view the topology. Routers E and F are running HSRP (Hot Standby Router Protocol). Router E has a higher priority, and both routers have standby preempt configured. Since Router E is normally the active router, what IP address should Host G use for its default gateway?

What does the Switchport block feature do?

What command would you use on a 7600 switch to enable load balancing mode per incoming label?

According to the IEEE 802.3 CSMA/CD specification, what is the proper signal for contact 6 of a PHY without an internal crossover MDI Signal?

Click the Exhibit button to view the topology. Host 1 and Host 2 are on Ethernet LANs in different buildings. A serial line is installed between two Cisco routers using Cisco HDLC serial line encapsulation. Routers A and B are configured to route IP traffic. Host 1 sends a packet to Host 2. A line hit on the serial line causes an error in the packet. When this is detected, the retransmission is sent by:

ATM switches use the VPI/VCI fields of the cell header: