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| Section | Objectives |
|---|---|
| Layer 2 Switching and VLANs | - VLAN concepts, tagging, ports, native VLAN - Inter-VLAN routing - Layer 2 switching concepts and operation - Configuration, monitoring and troubleshooting |
| Protocol Independent Routing | - Routing tables, routing preferences - Static routes, aggregate routes - Routing policy and firewall filters - Configuration, monitoring and troubleshooting |
| Layer 2 Security | - Layer 2 firewall filters - Port security, storm control, MAC limiting - Dynamic ARP inspection, DHCP snooping - Configuration, monitoring and troubleshooting |
| High Availability | - Graceful restart, nonstop active routing - Virtual Chassis, redundant routing engines - Configuration, monitoring and troubleshooting |
| OSPF | - Neighbor relationships, route calculation - OSPFv2/v3 concepts, areas, LSA types - Configuration, monitoring and troubleshooting |
| Tunnels | - IP-IP, GRE, IPsec tunnels - Configuration, monitoring and troubleshooting |
| Spanning Tree Protocol | - Root bridge, port roles and states - STP, RSTP, MSTP concepts and operation - Configuration, monitoring and troubleshooting |
| BGP | - IBGP, EBGP, route policies - Configuration, monitoring and troubleshooting - BGP concepts, attributes, path selection |
| IS-IS | - IS-IS concepts, levels, routing information - Configuration, monitoring and troubleshooting |
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NEW QUESTION # 176
Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)
Answer: B,C
Explanation:
Option B is correct. Flooding is a mechanism used in Layer 2 bridging where the switch sends incoming packets to all its ports except for the port where the packet originated1. This is done when the switch doesn't know the destination MAC address or when the packet is a broadcast or multicast1.
Option C is correct. Learning is another mechanism used in Layer 2 bridging where the switch learns the source MAC addresses of incoming packets and associates them with the port on which they were received23. This information is stored in a MAC address table, also known as a bridge table23.
Option A is incorrect. Blocking is a state in Spanning Tree Protocol (STP) used to prevent loops in a network2. It's not a mechanism used in building and maintaining a Layer 2 bridge table2.
Option D is incorrect. Listening is also a state in Spanning Tree Protocol (STP) where the switch listens for BPDUs to make sure no loops occur in the network before transitioning to the learning state2. It's not a mechanism used in building and maintaining a Layer 2 bridge table2.
NEW QUESTION # 177
Both the R1 and R2 devices are advertising prefix X into AS 65530 with the BGP attributes shown in the exhibit.
Which statement is correct in this scenario?
Answer: D
NEW QUESTION # 178
You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario?
(Choose two.)
Answer: B,C
Explanation:
In BGP, routing policies are used to control the flow of routing information between BGP peers.
Option C suggests that import policies are applied after the RIB-In table. This is correct because import policies in BGP are applied to routes that are received from a BGP peer, before they are installed in the local BGP Routing Information Base (RIB-In). The RIB-In is a database that stores all the routes that are received from all peers.
Option D suggests that export policies are applied after the RIB-Local table. This is correct because export policies in BGP are applied to routes that are being advertised to a BGP peer, after they have been selected from the local BGP Routing Information Base (RIB-Local). The RIB-Local is a database that stores all the routes that the local router is using.
NEW QUESTION # 179
Which two statements are correct about IS-IS? (Choose two.)
Answer: A,C
NEW QUESTION # 180
Exhibit
Which command displays the output shown in the exhibit?
Answer: A
Explanation:
The output shown in the exhibit is a brief display of the Ethernet switching table, which shows the learned Layer 2 MAC addresses for each VLAN and interface1.
The command show ethernet-switching table displays the Ethernet switching table with brief information, such as the destination MAC address, the VLAN name, the forwarding state, and the interface name1.
The command show route forwarding-table displays the routing table information for each protocol family, such as inet, inet6, mpls, iso, and so on2. It does not show the Ethernet switching table or the MAC addresses.
The command show ethernet-switching table extensive displays the Ethernet switching table with extensive information, such as the destination MAC address, the VLAN name, the forwarding state, the interface name, the VLAN index, and the tag type1. It shows more details than the brief output shown in the exhibit.
The command show route forwarding-table family ethernet-switching displays the routing table information for the ethernet-switching protocol family, whichshows the destination MAC address, the next-hop MAC address, and the interface name3. It does not show the VLAN name or the forwarding state.
NEW QUESTION # 181
......
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