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| Section | Objectives |
|---|---|
| Layer 2 Security | - Switch security features
|
| Layer 2 Switching | - VLANs and trunking
|
| Tunneling Technologies | - IP tunneling
|
| High Availability | - Redundancy mechanisms
|
| Layer 3 Routing Fundamentals | - Routing concepts
|
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NEW QUESTION # 26
You are receiving multiple BGP routes from an upstream neighbor and only want to advertise a single summarized prefix to your internal OSPF neighbors. This route should only be advertised when you are receiving these BGP routes from this neighbor.
In this scenario, which type of route should you create?
Answer: B
Explanation:
Both aggregate and generated routes would work, but the best choice is generated routes.
NEW QUESTION # 27
What is the maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation?
Answer: A
Explanation:
The maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation is
1476 bytes. This is because GRE packets are formed by the addition of the original packets and the required GRE headers. These headers are 24-bytes in length and since these headers are added to the original frame, depending on the original size of the packet we may run into IP MTU problems. The most common IP MTU is 1500-bytes in length (Ethernet). When the tunnel is created, it deducts the 24-bytes it needs to encapsulate the passenger protocols and that is the IP MTU it will use. For example, if we are forming a tunnel over FastEthernet (IP MTU 1500) the IOS calculates the IP MTU on the tunnel as: 1500-bytes from Ethernet-24-bytes for the GRE encapsulation = 1476-Bytes.
NEW QUESTION # 28
Which two statements correctly describe RSTP port roles? (Choose two.)
Answer: C,D
Explanation:
In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree 1 .
Option A suggests that the designated port forwards data to the downstream network segment or device. This is correct because the designated port is the port on a network segment that has the best path to the root bridge
1 . It's responsible for forwarding frames towards the root bridge and sending configuration messages into its segment 1 .
Option D suggests that the root port is responsible for forwarding data to the root bridge. This is also correct because the root port is always the link directly connected to the root bridge, or the shortest path to the root bridge 1 . It's used to forward traffic towards the root bridge 1 .
Therefore, options A and D are correct.
NEW QUESTION # 29
Click the Exhibit button.
Which two statements about the firewall filter terms shown in the exhibit are true? (Choose two.)
Answer: C,D
Explanation:
A firewall filter is a Junos security solution to filter or control traffic at the data plane as they enter or exit an interface 1 . A firewall filter consists of one or more terms, each with a set of conditions and actions 2 . The device evaluates every packet against the firewall filter terms in the order they are defined, and performs the actions specified in the first term that matches the packet 3 . If no term matches the packet, the device discards the packet by default 3 .
In the exhibit, the firewall filter mac-address is applied to the family ethernet-switching and involves filtering MAC addresses. There are two terms, term one and term two , each with different conditions and actions. The from statement specifies the match conditions, and the then statement specifies the actions. If the from statement is omitted, all packets are considered to match and the actions in the then statement are taken 2 . If the then statement is omitted, the packets that match the conditions in the from statement are accepted by default 2 .
* Term one logs traffic from a specific source MAC address 88:05:00:29:3c:de/48 . The log action is a nonterminating action, which means that the device continues to evaluate the packet against the remaining terms in the filter 2 . Therefore, traffic that matches the from statement in term one is not discarded, and option A is incorrect.
* Term two accepts all other traffic not specified in term one. The then accept action is a terminating action, which means that the device stops evaluating the packet against the filter and forwards the packet 2 . Therefore, all traffic not matching the from statement in term one is accepted by term two, and option D is correct.
* Term two does not have a from statement, which means that all packets are considered to match this term. Therefore, traffic matching the from statement in term two is not logged, and option B is incorrect.
* Term one does not have a then statement other than the log action, which means that the packets that match the from statement are accepted by default. Therefore, traffic that matches the from statement in term one is accepted, and option C is correct.
References:
2 : term (Firewall Filter)
3 : Firewall Filters Overview
1 : Juniper Firewall Filter Configuration Example
NEW QUESTION # 30
You are attempting to configure the initial two aggregated Ethernet interfaces on a router but there are no aggregated Ethernet interfaces available.
In this scenario, which configuration will enable these interfaces on this router?
Answer: C
Explanation:
The correct answer to your question is C. Option C . Here is why:
* Option C shows the configuration of the chassis statement, which defines the properties of the router chassis, such as the number of aggregated Ethernet interfaces, the number of FPCs, and the number of PICs 1 .
* To enable aggregated Ethernet interfaces on a router, you need to specify the aggregated-devices statement under the chassis statement and set the ethernet parameter to the desired number of interfaces 2 . For example, to enable two aggregated Ethernet interfaces, you can use the following configuration:
chassis { aggregated-devices { ethernet { device-count 2; } } }
* Option C shows this configuration with the device-count set to 2, which will enable two aggregated Ethernet interfaces on the router. The other options do not show this configuration and will not enable any aggregated Ethernet interfaces on the router.
* Therefore, option C is the correct answer to your question.
NEW QUESTION # 31
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