Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR)377 questions across 38 pages are complete and free, with no account or card.
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A remote operation center is deploying a set of I-BGP and E-BGP connections for multiple IOS-XR platforms using the same template. The I-BGP sessions exchange prefixes with no apparent issues, but the E-BGP sessions do not exchange routes. What causes this issue?
Answer: B
Refer to the exhibit. Routers R1 and R2 are part of a large enterprise network. The two devices are running BGP to advertise routes between them. The R1 Gi0/1 interface, which is connected to R2. is configured with the next hop for all advertised prefixes’ IP addresses. A network engineer noticed that R2 is not receiving certain routes from R1, which is causing connectivity issues. The engineer confirmed that the R2 IP address is reachable, and R2 is not filtering routes. Which action must the engineer take on R1 to resolve the issue?
Answer: C
Refer to the exhibit. An engineer is securing a customer's network. Which command must the engineer use to complete this configuration to prevent a DoS attack?
Answer: D
I disagree, as stated in the other comments, the platform is IOS XR so we're already in 'neighbor' configuration mode, so we only need to enter the ttl-security configura tion.
Source: Adapted from community discussion — ric859
Refer to the exhibit. A service provider is running MPLS in the core to support Layer 3 VPN. OSPF is configured to support dynamic routing, and BGP is enabled throughout the network. A network engineer is adding a new P router to the infrastructure and is connecting it to P1 and P3. Which task must the engineer perform on the new router to allow it to participate in the Layer 3 VPN?
Answer: A
What is the function of the FEC field within the OTN signal structure?
Answer: C
A customer of an ISP requests support to setup a BGP routing policy. Which BGP attribute should be configured to choose specific BGP speakers as preferred points for the customer AS?
Answer: D
I REALLY think the answer is B. I may be reading to much into this, but here's my take. This is the Service Provider exam, so in my opinion we need to approach this as being the service provider, and therefore, need to see this as changes that need to be made on our equipment. Service providers generally don't make changes of this kind for one customer but they do have BGP policy lists that are available to customers to use to put community tags on their prefixes that will cause policies on the service provider to be enacted. Through the use of community tags by the customer, and community lists by us (the service provider), the path can be manipulated by use of a route-map that adjusts the local preference of how to reach the customer's site. So I think B is the best answer.
Source: Adapted from community discussion — Guitarman
Which wildcard is used with programmable APIs to Identify the values Cisco, Ciscotest, and CiscoSystems?
Answer: A
Which three OSPF parameters must match before two devices can establish an OSPF adjacency? (Choose three.)
Answer: BEF
Refer to the exhibit. Which condition must be met by the OSPF peer of router R1 before the two devices can establish communication?
Answer: D
Reference: https://networklessons.com/ospf/how-to-configure-ospf-md5-authentication
Source: Adapted from community discussion — Mephystopheles
DRAG DROP - Drag and drop the OSPF area types from the left onto the correct statements on the right. Select and Place:
This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.
Answer: See figure below
Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page
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