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| Section | Weight | Objectives |
|---|---|---|
| Routing and Traffic Control | 10% | - Traffic engineering basics - Policy-based routing |
| Network Service and Management | 2% | - Network management basics |
| IS-IS | 8% | - IS-IS protocol fundamentals |
| Network Solution | 2% | - Integrated network design scenarios |
| Multicast | 9% | - IGMP and PIM concepts |
| BGP | 17% | - BGP path selection - BGP policy and attributes |
| OSPF | 16% | - OSPF core concepts - OSPF areas and LSDB |
| Network Reliability | 8% | - Redundancy and failover mechanisms |
| Network Security | 9% | - ACL and basic security mechanisms |
| Switching Technologies | 7% | - VLAN and STP fundamentals |
| Large-scale WLAN Architecture | 6% | - Enterprise WLAN deployment basics |
| IPv6 | 3% | - IPv6 addressing and routing |
| Routing Fundamentals | 3% | - Network basics and routing principles |
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NEW QUESTION # 278
Drag and Drop Question
On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.
Answer:
Explanation:
Explanation:
The sequence of steps for electing the root port in an STP (Spanning Tree Protocol) network is as follows:
Bridge ID Comparison: The Bridge ID (BID) is compared between the bridges in the network. A smaller value indicates a higher priority, meaning the bridge with the lowest Bridge ID is elected as the root bridge.
RPC (Root Path Cost) Comparison: The path cost to reach the root bridge is calculated. The router with the lowest Root Path Cost (RPC) to the root bridge will have a higher priority for the election of the root port.
Peer BID Comparison: If there is a tie in the Root Path Cost, the Peer BID is compared. A smaller Peer BID indicates a higher priority. This step ensures that if two routers have the same RPC, the one with the lower Peer Bridge ID wins.
Local BID Comparison: If there is still a tie, the Local BID is compared. A smaller Local BID indicates a higher priority. This final step ensures that the router with the lowest local identifier is selected.
Bridge ID Comparison:
The first step in electing the root port is comparing the Bridge IDs. The bridge with the lowest Bridge ID becomes the root bridge. The Bridge ID is made up of the bridge priority and MAC address. The root bridge is the center of the network for STP, and all other ports will calculate their paths based on this root.
NEW QUESTION # 279
See the command output of a router below. Which of the following statements is true?
<R2>display ospf interface GigabitEthernet 0/0/0 verbose
OSPF Process 1 with Router ID 10.0.2.2
Interface: 10.0.12.2 (GigabitEthernet 0/0/0)
Cost: 1 State: BDR Type: Broadcast MTU: 1500
Priority: 1
Designated Router: 10.0.12.1
Backup Designated Router: 10.0.12.2
Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1
Answer: A
Explanation:
The output shows that the router with the IP10.0.12.2is the Backup Designated Router (BDR), as indicated in theState: BDRfield. The router ID is10.0.2.2, the interface cost is 1, and the IP address of the interface is10.
0.12.2. Hence, C is the correct answer .
NEW QUESTION # 280
SSH uses asymmetric addition AES and DES to achieve data transmission security, and uses HMAC to ensure complete integrity verification of data.
Answer: A
NEW QUESTION # 281
A VRRP virtual router is configured with a VRID of 3 and a virtual IP address of 100.1.1.10, so which of the following is the virtual C address?
Answer: D
NEW QUESTION # 282
When roaming is configured on a WLAN, which of the following factors may cause inter-AC roaming failure? (Multiple choice)
Answer: C,D
NEW QUESTION # 283
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