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| Section | Objectives |
|---|---|
| Topic 1: Protocol Independent Routing | - Static routes, aggregate routes - Configuration, monitoring and troubleshooting - Routing tables, routing preferences - Routing policy and firewall filters |
| Topic 2: Tunnels | - IP-IP, GRE, IPsec tunnels - Configuration, monitoring and troubleshooting |
| Topic 3: Spanning Tree Protocol | - Root bridge, port roles and states - Configuration, monitoring and troubleshooting - STP, RSTP, MSTP concepts and operation |
| Topic 4: IS-IS | - Configuration, monitoring and troubleshooting - IS-IS concepts, levels, routing information |
| Topic 5: High Availability | - Configuration, monitoring and troubleshooting - Graceful restart, nonstop active routing - Virtual Chassis, redundant routing engines |
| Topic 6: Layer 2 Security | - Dynamic ARP inspection, DHCP snooping - Configuration, monitoring and troubleshooting - Port security, storm control, MAC limiting - Layer 2 firewall filters |
| Topic 7: Layer 2 Switching and VLANs | - Layer 2 switching concepts and operation - Inter-VLAN routing - Configuration, monitoring and troubleshooting - VLAN concepts, tagging, ports, native VLAN |
| Topic 8: OSPF | - OSPFv2/v3 concepts, areas, LSA types - Configuration, monitoring and troubleshooting - Neighbor relationships, route calculation |
| Topic 9: BGP | - BGP concepts, attributes, path selection - Configuration, monitoring and troubleshooting - IBGP, EBGP, route policies |
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NEW QUESTION # 12
What does the * indicate in the output shown in the exhibit?
Answer: B
Explanation:
The exhibit shows the output of the command show vlans brief, which displays brief information about VLANs and their associated interfaces.
The output has four columns: Routing instance, VLAN name, Interfaces, and Tagging. The * symbol indicates that the interface is active, meaning that it is up and forwarding traffic. This can be verified by the command show interfaces terse, which displays the status of the interfaces.
NEW QUESTION # 13
You have two OSPF routers forming an adjacency. R1 has a priority of 32 and a router ID of 192.168.1.2. R2 has a priority of 64 and a router ID of 192.168.1.1. The routers were started at the same time and all other OSPF settings are the default settings.
Which statement is correct in this scenario?
Answer: D
Explanation:
In OSPF, a DR (Designated Router) and a BDR (Backup Designated Router) are elected on each multi-access network, such as Ethernet or Frame Relay. The DR and BDR are responsible for exchanging routing information with other routers on the same network segment. The election is based on two criteria: the OSPF priority and the router ID. The router with the highest priority becomes the DR, and the router with the second-highest priority becomes the BDR. If the priorities are equal, the router with the highest router ID becomes the DR, and the router with the second-highest router ID becomes the BDR. The default priority is 1, and the router ID is either manually configured or derived from the highest IP address on any interface12.
In this scenario, R1 has a priority of 32 and a router ID of 192.168.1.2, and R2 has a priority of 64 and a router ID of 192.168.1.1. Since R2 has a higher priority than R1, it will become the BDR. The router ID does not matter in this case, because the priority is different. Therefore, the correct answer is C.
The other options are not correct because:
A). At least two routers are required for a DR/BDR election, not three2.
B). Router IDs do not have to match for an adjacency to form, they just have to be unique3.
D). R1 will not be the BDR, because it has a lower priority than R212.
References: Understanding OSPF Areas | Junos OS, OSPF DR/BDR Election explained - NetworkLessons.
com, OSPF adjacency - Cisco Community
NEW QUESTION # 14
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 # 15
Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)
Answer: B,D
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 # 16
Referring to the output shown in the exhibit, which statement is correct?
Answer: B
Explanation:
In OSPF, the state of the neighbor relationship is determined by the exchange of OSPF packets between routers. The state "2Way" as shown in the exhibit indicates that bi-directional communication has been established between the two OSPF routers. This is the normal state for a neighbor that is not the Designated Router (DR) or Backup Designated Router (BDR) on a broadcast, non-broadcast multi-access (NBMA), or point-to-multipoint network. These neighbors are often referred to as "DRothers". Therefore, option B is correct.
NEW QUESTION # 17
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