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| Section | Weight | Objectives |
|---|---|---|
| WAN for Enterprise Networks | 20% | - Design QoS for WAN - Design SD-WAN solution - Design WAN connectivity |
| Advanced Addressing and Routing Solutions | 25% | - Determine IPv6 migration strategy - Create stable, secure, and scalable routing designs for Layer 3 - Create structured addressing designs |
| Enterprise Campus Security | 20% | - Design network security - Design network access control |
| Advanced Enterprise Campus Networks | 25% | - Design campus network services (QoS, multicast, etc.) - Design for high availability - Design Layer 2 and Layer 3 campus networks |
| Services | 10% | - Design network management - Design end-to-end QoS policy |
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NEW QUESTION # 98
A company requested that an architect propose a new IPv4 and IPv6 deployment strategy. The company wants a solution that is straightforward, with no information hiding or forwarding overhead. Which solution meets these requirements?
Answer: A
NEW QUESTION # 99
A company wants to enable several third-party video conferencing networks based on multicast services. The video conferencing platform can accommodate numerous and dispersed senders and receivers in third-party networks The interior routing protocol is OSPF and the exterior routing protocol is BGP Which multicast mode must be selected to achieve this goal?
Answer: B
Explanation:
BIDIR-PIM is the correct multicast mode for a video conferencing environment with numerous dispersed senders and receivers. Bidirectional PIM is designed for many-to-many multicast applications where receivers may also transmit and where maintaining per-source trees would create unnecessary state and control-plane overhead. Instead of building a shortest-path tree for every source, BIDIR-PIM uses a shared tree rooted at the rendezvous point and forwards traffic bidirectionally. This makes it attractive for collaborative applications and conferencing scenarios with many active participants. MP-BGP can carry multicast VPN or multicast routing information in service-provider designs, but it is not itself the multicast forwarding mode for this requirement. MSDP is used to exchange source information between PIM-SM domains, not to optimize many- to-many forwarding within the multicast design. IGMPv2 handles host membership signaling on local segments and does not provide the routed multicast mode. Reference topics: BIDIR-PIM, many-to-many multicast, shared tree, video conferencing multicast, PIM design.
NEW QUESTION # 100 
Refer to the exhibit. An engineer is planning an IPv4 to IPv6 migration solution for a customer. The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers. Which IPv6 migration technique must the engineer deploy?
Answer: A
Explanation:
Dual-stack is the correct IPv6 migration technique because the DWDM devices provide Layer 2 transport between routers that already support both IPv4 and IPv6. Layer 2 transport is generally transparent to IPv6 because it forwards Ethernet frames rather than participating in Layer 3 routing. The routers at the ends of the DWDM circuit can peer directly over the Layer 2 service and run IPv6 in parallel with IPv4, while mail servers can also retain IPv4 reachability during the migration. Cisco dual-stack migration guidance uses simultaneous IPv4 and IPv6 operation to support phased application and host transition with minimal tunneling overhead. 6to4, ISATAP, and 6rd are tunneling or transition mechanisms used when IPv6 islands must cross IPv4-only routed infrastructure. In this case, the limiting devices are in the transport layer and do not need to route IPv6. Deploying dual-stack on the capable routers and servers is simpler, more transparent, and avoids unnecessary encapsulation. Reference topics: IPv6 dual-stack migration, Layer 2 transparency, IPv6 over Ethernet, tunneling avoidance, phased migration.
NEW QUESTION # 101
Which feature is required for graceful restart to recover from a processor failure?
Answer: A
Explanation:
https://archive.nanog.org/meetings/nanog42/presentations/Weissner_SSO.pdf
NEW QUESTION # 102
Refer to the exhibit.
Refer to the exhibit. A customer needs to apply QoS to the network management traffic passing through the GigabitEthernet0/2 interface. All eight queuing classes are in use, so the new requirement must be integrated into the existing policy. Which solution must the customer choose?
Answer: D
NEW QUESTION # 103
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