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| Section | Objectives |
|---|---|
| Layer 2 Switching and VLANs | - Layer 2 switching concepts and operation - Inter-VLAN routing - Configuration, monitoring and troubleshooting - VLAN concepts, tagging, ports, native VLAN |
| OSPF | - Configuration, monitoring and troubleshooting - OSPFv2/v3 concepts, areas, LSA types - Neighbor relationships, route calculation |
| Layer 2 Security | - Dynamic ARP inspection, DHCP snooping - Port security, storm control, MAC limiting - Configuration, monitoring and troubleshooting - Layer 2 firewall filters |
| High Availability | - Graceful restart, nonstop active routing - Configuration, monitoring and troubleshooting - Virtual Chassis, redundant routing engines |
| Spanning Tree Protocol | - Root bridge, port roles and states - STP, RSTP, MSTP concepts and operation - Configuration, monitoring and troubleshooting |
| Protocol Independent Routing | - Routing policy and firewall filters - Configuration, monitoring and troubleshooting - Routing tables, routing preferences - Static routes, aggregate routes |
| BGP | - IBGP, EBGP, route policies - BGP concepts, attributes, path selection - Configuration, monitoring and troubleshooting |
| Tunnels | - IP-IP, GRE, IPsec tunnels - Configuration, monitoring and troubleshooting |
| IS-IS | - Configuration, monitoring and troubleshooting - IS-IS concepts, levels, routing information |
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NEW QUESTION # 133
Which two statements are correct about tunnels? (Choose two.)
Answer: A,D
Explanation:
A tunnel is a connection between two computer networks, in which data is sent from one network to another through an encrypted link. Tunnels are commonly used to secure data communications between two networks or to connect two networks that use different protocols.
Option B is correct, because tunnel endpoints must have a valid route to the remote tunnel endpoint. A tunnel endpoint is the device that initiates or terminates a tunnel connection. For a tunnel to be established, both endpoints must be able to reach each other over the underlying network. This means that they must have a valid route to the IP address of the remote endpoint 1 .
Option D is correct, because tunnels add additional overhead to packet size. Tunnels work by encapsulating packets: wrapping packets inside of other packets. This means that the original packet becomes the payload of the surrounding packet, and the surrounding packet has its own header and trailer. The header and trailer of the surrounding packet add extra bytes to the packet size, which is called overhead. Overhead can reduce the efficiency and performance of a network, as it consumes more bandwidth and processing power 2 .
Option A is incorrect, because BFD can be used to monitor tunnels. BFD is a protocol that can be used to quickly detect failures in the forwarding path between two adjacent routers or switches. BFD can be integrated with various routing protocols and link aggregation protocols to provide faster convergence and fault recovery. BFD can also be used to monitor the connectivity of tunnels, such as GRE, IPsec, or MPLS.
Option C is incorrect, because IP-IP tunnels are stateless. IP-IP tunnels are a type of tunnels that use IP as both the encapsulating and encapsulated protocol. IP-IP tunnels are simple and easy to configure, but they do not provide any security or authentication features. IP-IP tunnels are stateless, which means that they do not keep track of the state or status of the tunnel connection. Stateless tunnels do not require any signaling or negotiation between the endpoints, but they also do not provide any error detection or recovery mechanisms.
References:
1 : What is Tunneling? | Tunneling in Networking 2 : What Is Tunnel In Networking, Its Types, And Its Benefits? : [Configuring Bidirectional Forwarding Detection] : [IP-IP Tunneling]
NEW QUESTION # 134
Your switches are managed using Junos Space Network Director. You want to secure the switches using a Network Director filter profile. A filter profile containing one term shown in the exhibit is deployed to ports on managed devices.
Which traffic will be accepted by the filter?
Answer: C
NEW QUESTION # 135
Which two statements are true about the default VLAN on Juniper switches? (Choose two.)
Answer: A,B
Explanation:
On Juniper switches, the default VLAN is set to a VLAN ID of 1 by default. This means that all interfaces on the switch are members of VLAN until they are specifically assigned to another VLAN. Therefore, option A is correct.
The default VLAN ID can be changed. This allows network administrators to configure the switch to use a different VLAN as the default, if necessary. Therefore, option D is correct.
NEW QUESTION # 136
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 interface 1 .
* 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 name 1 .
* The command show route forwarding-table displays the routing table information for each protocol family, such as inet, inet6, mpls, iso, and so on 2 . 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 type 1 . 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, which shows the destination MAC address, the next-hop MAC address, and the interface name 3 . It does not show the VLAN name or the forwarding state.
NEW QUESTION # 137
Which two statements are correct about OSPF area types? (Choose two.)
Answer: A,D
Explanation:
A stub area blocks Type 5 external LSAs from being flooded into it, relying instead on a default route to reach external destinations. A not-so-stubby area (NSSA) is a variation that allows external routes to be imported locally as Type 7 LSAs, which the Area Border Router (ABR) then translates into Type 5 LSAs for propagation into the backbone.
NEW QUESTION # 138
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