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| Section | Objectives |
|---|---|
| Topic 1: Tunnels | - IP-IP, GRE, IPsec tunnels - Configuration, monitoring and troubleshooting |
| Topic 2: Layer 2 Switching and VLANs | - Layer 2 switching concepts and operation - VLAN concepts, tagging, ports, native VLAN - Inter-VLAN routing - Configuration, monitoring and troubleshooting |
| Topic 3: Spanning Tree Protocol | - Root bridge, port roles and states - STP, RSTP, MSTP concepts and operation - Configuration, monitoring and troubleshooting |
| Topic 4: Layer 2 Security | - Layer 2 firewall filters - Port security, storm control, MAC limiting - Dynamic ARP inspection, DHCP snooping - Configuration, monitoring and troubleshooting |
| Topic 5: Protocol Independent Routing | - Routing tables, routing preferences - Static routes, aggregate routes - Routing policy and firewall filters - Configuration, monitoring and troubleshooting |
| Topic 6: BGP | - BGP concepts, attributes, path selection - IBGP, EBGP, route policies - Configuration, monitoring and troubleshooting |
| Topic 7: High Availability | - Graceful restart, nonstop active routing - Configuration, monitoring and troubleshooting - Virtual Chassis, redundant routing engines |
| Topic 8: OSPF | - OSPFv2/v3 concepts, areas, LSA types - Neighbor relationships, route calculation - Configuration, monitoring and troubleshooting |
| Topic 9: IS-IS | - IS-IS concepts, levels, routing information - Configuration, monitoring and troubleshooting |
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NEW QUESTION # 88
Exhibit
You are receiving the BGP route shown in the exhibit from four different upstream ISPs.
Referring to the exhibit, which ISP will be selected as the active path?
Answer: A
Explanation:
Explanation
In BGP, the path selection process is based on a set of attributes1. The process starts by preferring the path with the highest weight, then the highest local preference, then the locally originated routes, and so on1. If all these attributes are the same, then it prefers the path with the shortest AS path1.
Referring to the exhibit, all four ISPs have the same weight, local preference, and origin1. However, ISP 4 has the shortest AS path1. Therefore, ISP 4 will be selected as the active path. So, option C is correct.
NEW QUESTION # 89
What is the default MAC age-out timer on an EX Series switch?
Answer: A
Explanation:
The default MAC age-out timer on an EX Series switch is 300 seconds 1 2 . The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed 3 1 . This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces 1 . When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces 1 .
NEW QUESTION # 90
You are asked to connect an IP phone and a user computer using the same interface on an EX Series switch.
The traffic from the computer does not use a VLAN tag, whereas the traffic from the IP phone uses a VLAN tag.
Which feature enables the interface to receive both types of traffic?
Answer: C
Explanation:
Explanation
The feature that enables an interface on an EX Series switch to receive both untagged traffic (from the computer) and tagged traffic (from the IP phone) is the voice VLAN12.
The voice VLAN feature in EX-series switches enables access ports to accept both data (untagged) and voice (tagged) traffic and separate that traffic into different VLANs12. This allows the switch to differentiate between voice and data traffic, ensuring that voice traffic can be treated with a higher priority12. Therefore, option D is correct.
NEW QUESTION # 91
You are asked to change the setting for the LSAs age out back to the default value. In this scenario, which time interval will accomplish this task?
Answer: D
NEW QUESTION # 92
In an OSPF network, what is the purpose of a virtual link?
Answer: D
Explanation:
An OSPF virtual link is used to logically connect an area that lacks direct physical connectivity to area 0 (the backbone) by tunneling through an intermediate, non-stub transit area. This ensures that all areas maintain the required logical connection to the backbone, which is a fundamental requirement of OSPF's two-tier hierarchical design.
NEW QUESTION # 93
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