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| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Implementing Cisco Enterprise Advanced Routing and Services v1.1 |
| Exam Number: | 300-410 ENARSI |
| Certificate Validity Period: | 3 years |
| Related Certifications: | Cisco Certified Specialist – Enterprise Advanced Infrastructure Implementation CCNP Enterprise |
| Exam Price: | USD 300 |
| Exam Format: | Multiple select, Case study, Simulation, Multiple choice |
| Passing Score: | Not officially disclosed |
| Real Exam Qty: | 60–70 |
| Exam Duration: | 90 minutes |
| Available Languages: | Japanese, English |
| Recommended Training: | Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Training |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Cisco 300-410 Sample Questions |
| Exam Way: | Online proctored or onsite testing center |
| Pre Condition: | Recommended: Knowledge equivalent to CCNP Enterprise core exam (300-401 ENCOR) or equivalent experience |
| Official Syllabus URL: | https://www.cisco.com/c/dam/en_us/training-events/le31/le46/cln/marketing/exam-topics/300-410-ENARSI.pdf |
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To prepare for the Cisco 300-410 exam, candidates can attend training courses or use study materials such as books, videos, and practice exams. Cisco also offers online resources, including study groups and forums, where candidates can connect with other professionals and share their knowledge and experience. It is essential to have hands-on experience in implementing routing and services in an enterprise network to succeed in 300-410 exam.
Cisco 300-410 certification exam is a challenging exam that requires a strong understanding of advanced routing and services technologies. However, passing 300-410 Exam can help network engineers advance their careers and demonstrate their expertise in designing and managing complex enterprise networks.
Cisco 300-410 certification exam consists of 60-70 multiple-choice and simulation questions that must be completed within 90 minutes. 300-410 exam is available in English and Japanese and can be taken at any Pearson VUE testing center worldwide. The passing score for the exam is set at 825 out of 1000 points. Candidates who pass the exam will be awarded the Cisco Certified Specialist - Enterprise Advanced Infrastructure Implementation certification.
NEW QUESTION # 648
Refer to the exhibit.
After redistribution is enabled between the routing protocols; PC2, PC3, and PC4 cannot reach PC1. Which action can the engineer take to solve the issue so that all the PCs are reachable?
Answer: C
NEW QUESTION # 649
Refer to the exhibit.
An engineer is troubleshooting failed access by contractors to the business application server via Telnet or HTTP during the weekend. Which configuration resolves the issue?
A)
B)
C)
D)
Answer: D
NEW QUESTION # 650
Refer to the exhibit.
An engineer must enhance the end-user experience at a branch by performing configurations on branch router R1. Which configuration prevents fragmentation of IP packets after GRE and IPsec overheads are added to the final packet for transport?
Answer: D
Explanation:
According to the Cisco Press 300-410 ENARSI (Implementing Cisco Enterprise Advanced Routing and Services) official study guide, fragmentation in a DMVPN (GRE + IPsec) environment occurs when the total size of an encapsulated packet exceeds the MTU of the physical exit interface (typically 1500 bytes on Ethernet).
1. The Mechanics of Overhead:
When a packet travels through a DMVPN tunnel, the following overheads are added to the original IP payload:
* GRE Header: 24 bytes.
* IPsec (ESP) Header/Trailer: Approximately 50 to 70 bytes (depending on the transform set and padding).
* Total Recommended Reduction: To ensure packets do not exceed 1500 bytes after all headers are added, Cisco best practices recommend setting the IP MTU of the tunnel interface to 1400 bytes .
2. The Role of TCP MSS:
The ip tcp adjust-mss command is used to influence the TCP Three-Way Handshake. It modifies the Maximum Segment Size (MSS) value in the SYN packets. The MSS value represents the maximum amount of data a host can send in a single TCP segment.
* Calculation: The MSS should be the Interface MTU minus 40 bytes (20 bytes for the IP header and
20 bytes for the TCP header).
* Formula: $MSS = MTU - 40$
3. Analysis of the Exhibit:
Looking at the current configuration on R1:
* The ip mtu is set to 1400 .
* The ip tcp adjust-mss is currently set to 1436 .
* The Conflict: With an MTU of 1400, a TCP MSS of 1436 is logically incorrect. It tells the hosts they can send segments that, once headers are added, will result in 1476-byte packets ($1436 + 40$). When these 1476-byte packets hit the Tunnel interface with an MTU of 1400, they will be fragmented before even reaching the IPsec encryption stage.
4. Conclusion:
To prevent fragmentation and optimize the end-user experience (especially for web traffic and file transfers), the TCP MSS must be adjusted to align with the 1400-byte MTU.
$$1400 \text{ (MTU)} - 40 \text{ (Headers)} = 1360 \text{ (MSS)}$$
By configuring ip tcp adjust-mss 1360 , the router ensures that TCP sessions are established with a segment size that fits perfectly within the 1400-byte MTU limit of the tunnel, thereby avoiding fragmentation after the GRE and IPsec headers are appended for transport over the physical link.
NEW QUESTION # 651
How does MPLS Layer 3 VPN function?
Answer: A
NEW QUESTION # 652
Refer to the exhibit. A network engineer configured routers R1 and R2 with MP-BGP. The engineer noticed that the routers cannot exchange any IPv6 routes; however, the IPv4 neighbor relationship is working fine.
Which configuration must the engineer apply to router R2 to exchange IPv6 routes?
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