From the global configuration, you’d type lldp run Turning it off per interface is also allowed, from the interface configuration, use no lldp enable. Verifying it’s enabled, show lldp
POE adds the ability to add on network devices without having an electrician. Great when also backed up by UPS/Generators Used for IP Phones, Access Points, and other devices.
Review Questions: 1. At which of the three hierarchical layers does an end system attach itself to your network? A. Core B. Distribution C. Collapsed Core D. Access 2. The Distribution layer is used to forward data based on which of the following? A. IP routing B. MAC address table C. ACLs D. QoS 3. Which Distribution layer policy would help give preference to voice/video packets at points where traffic aggregation occurs? A. ACL B. QoS C. Routing policies D. VACL 4. Which of the three hierarchical layers would be described as being focused on high-speed forwarding of traffic, and would include redundancy and fast convergence? A. Core B. Distribution C. Access D. None of the above 5. True or False: The Collapsed Core option is the combination of the Core and Access layers. A. True B. False 6. Layer 2 switching only considers which of the following to make forwarding decisions (assuming Ethernet for the protocol)? A. MAC address found in the routing table B. MAC address found in the TCAM table C. MAC address found in the CAM table D. MAC address of the switch interface
7. Which of the following switching tables would store information about ACLs and/or QoS policies? A. CAM B. MAC C. TCAM D. Routing 8. A Multilayer switch can make forwarding decisions for which of the following (assuming Ethernet)? A. MAC B. Circuit ID C. Classification D. IP address E. A & B F. B & C G. A & D 9. True or False: When a frame is sent to a router for routing on the IP address, the original Layer 2 portion of the frame will be re-written (while assuming Ethernet). A. True B. False 10. The routing protocol communications and routing table are created in which of the following hardware architectures? A. Data plane B. Backbone fabric C. Control plane D. FIB
Answer Key: 1. D Cisco defines the Access layer as the point of attachment to all end devices. 2. A Even though we use the term Multilayer (or Distribution layer) switch, the decisions on how to forward traffic is made on IP routing tables. 3. B QoS is the policy that can help you in creating a policy to give different preferences to certain types of traffic when it comes to forwarding. 4. A The Core layer is defined as being your high-speed backbone. 5. B False. The Collapsed Core is the combination of the Core and Distribution layers. 6. C The association of the destination MAC address to port is found in the CAM table, and it is this table that the L2 switch uses for forwarding traffic. 7. C The TCAM table will store the policies that affect how a frame is going to be filtered or forwarded with QoS. 8. G Multilayer switches can forward based on MAC or IP, which would be either Layer 2 or Layer 3. This is why it’s designated a Multilayer switch. 9. A True. The Ethernet portion of the frame is re-written after a routing decision is made, and the egress interface is determined. 10. C The control plane handles the communication of the routing protocols, then after collecting routing information from neighbors, calculates the routing table. This is then sent into the data plane as a FIB.
