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NEW QUESTION # 44
Exhibit
Your network receives the full Internet BGP routing table from two different ISPs. You want your local routers to use Provider A to forward all Internet traffic as long as Provider A is available.
Referring to the exhibit, which two actions would satisfy this requirement? (Choose two.)
Answer: B,D
Explanation:
In BGP path selection, the Local Preference attribute is one of the most common ways to influence outbound traffic from an Autonomous System (AS). It is a well-known discretionary attribute that is propagated throughout the AS to tell internal routers which path is preferred for a specific destination.
Priority Rule: In the BGP selection algorithm, a higher local preference value is always preferred over a lower one. The default value in Junos OS is 100.
Influencing Outbound Traffic (Option A): To ensure that Provider A is always preferred, you would apply an import policy on R1 (the router connected to Provider A) to set the local preference of all received routes to a value higher than the default (e.g., 200). Since 200 > 100, R3 and R4 will prefer the path via R1.
Alternative Method (Option C): Conversely, you can achieve the same result by applying an import policy on R2 (the router connected to Provider B) to set the local preference to a value lower than the default (e.g., 50).
Since the routes from R1 remain at the default of 100, and 100 > 50, the path via R1 (Provider A) is preferred.
Why B and D are incorrect: Setting a higher local preference on R2 (Option B) would make Provider B the preferred exit point. Setting a lower local preference on R1 (Option D) would make Provider A the least preferred exit point.
NEW QUESTION # 45
Exhibit
You want to provide better performance for the video traffic that traverses your network The video traffic enters your network without any class-of-service markings According to Juniper Networks, which two classification methods are performed by the routers shown in the exhibit? (Choose two.)
Answer: C,D
Explanation:
The exhibit illustrates a standard end-to-end Class of Service (CoS) path consisting of an edge router (R1) and core/intermediate routers (R2 and R3).
* Edge Classification (Option B): The scenario specifies that video traffic enters the network without any class-of-service markings. Because there are no DSCP or 802.1p bits to inspect, the ingress router (R1) cannot use simple Behavior Aggregate (BA) classification. Instead, it must use Multifield (MF) classification. MF classification allows the router to look deeper into the packet (Source/Destination IP, Protocol, Port numbers) to identify the video stream and assign it to a specific forwarding class. * Core Classification (Option D): Once R1 has identified the traffic, it will typically apply a rewrite rule on its egress interface to mark the packets with a specific CoS value (like a DSCP code). Consequently, the downstream routers (R2 and R3) do not need to perform expensive deep-packet inspection again. They can use Behavior Aggregate (BA) classification, which simply looks at the markings in the packet header to determine the appropriate forwarding priority.
* Option A and C: These are incorrect because BA classification is impossible on unmarked ingress traffic, and performing MF classification in the core is inefficient and not a recommended Juniper design practice for high-speed transit.
NEW QUESTION # 46
Your enterprise network is running BGP VPNs to support multitenancy. Some of the devices with which you peer BGP do not support the VPN NLRI. You must ensure that you do not send BGP VPN routes to the remote peer.
Which two configuration steps will satisfy this requirement? (Choose two.)
Answer: B,C
NEW QUESTION # 47
Routers R1 and R2 receive the same 172.16.1.0/24 prefix from external AS 200 and AS 300. R1 and R2 change the Local-Preference of the prefix to 250 in an export policy towards both of their IBGP peers.
Referring to the exhibit, which statement is true?
Answer: B
NEW QUESTION # 48
Which two statements are correct about EVPN Pure Type-5 routes? (Choose two.)
Answer: A,B
Explanation:
EVPN Pure Type-5 routes are used to carry IP prefixes between IP-VRFs without any associated MAC addresses. They require an overlay next hop for proper VXLAN routing and are commonly referred to as IP-VRF-to-IP-VRF routes. They do not rely on Type-7 sync routes and are not advertised with the MAC extended community, as no MAC address is involved.
NEW QUESTION # 49
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