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Cisco CCDE Written Exam will validate that professionals have the expertise to gather and clarify network functional requirements, develop network designs to meet functional specifications, develop an implementation plan, convey design decisions and their rationale, and possess expert-level network infrastructure knowledge. 

NO.1 Refer to the exhibit.

Company A is running a single-area OSPF, and Company B is running RIP as the IGP with no

overlapping IP address spaces. Company A has just acquired Company B and both networks must be

merged. Which three design components are recommended to guarantee connectivity and

redundancy between the two networks? (Choose three.)

A. Enable mutual redistribution between OSPF and RIP on one border router.

B. Enable mutual redistribution between OSPF and RIP on Router A and Router B using route tags.

C. Increase the administrative distance to 130 for the OSPF external prefixes on Router A and Router

B.

D. Implement an ACL on Router A and Router B to prevent OSPF external routes from being installed

in the OSPF database.

E. Filter external routes on Router A and Router B based on route tags.

Answer: B,C,E

 

NO.2 On a large-scale DMVPN network design, what are two DMVPN characteristics? (Choose two.)

A. DMVPN can interoperate with other vendors' equipment.

B. DMVPN supports multicast replication at the hub.

C. DMVPN supports non-IP protocols.

D. DMVPN supports dynamic partial- or full-mesh tunnels.

Answer: B,D

 

NO.3 A large enterprise customer is migrating thousands of retail offices from legacy TDM circuits to

an Ethernet-based service. The network is running OSPF and has been stable for many years. It is now

possible to backhaul the circuits directly to the data centers, bypassing the regional aggregation

routers. Which two networking issues need to be addressed to ensure stability with the new design?

(Choose two.)

A. Nothing will change if the number of offices is the same.

B. Nothing will change if the number of physical interfaces stays the same.

C. The RIB will increase significantly.

D. The FIB will increase significantly.

E. The amount of LSA flooding will increase significantly.

F. The size of the link-state database will increase significantly.

Answer: E,F

 

NO.4 Refer to the exhibit.

Which two options are two characteristics of the single-tier headend architecture for DMVPN

designs? (Choose two.)

A. The mGRE and crypto functions are on the same router.

B. Each DMVPN cloud has two different headend routers for high availability purposes.

C. It is used in dual-cloud topologies for spoke-to-spoke connectivity.

D. It only supports hub-and-spoke connectivity.

E. Spokes cannot be used as RP in multicast deployments.

Answer: A,C

 

NO.5 Which mechanism provides a Layer 2 fault isolation between data centers?

A. TRILL

B. LISP

C. advanced VPLS

D. OTV

E. fabric path

Answer: D

 

NO.6 A company would like to distribute a virtual machine (VM) hosting cluster between three data

centers with the capability to move VMs between sites. The connectivity between data centers is IP

only and the new design should use the existing WAN. Which Layer 2 tunneling technology do you

recommend?

A. VPLS

B. L2TPv3

C. OTV

D. AToM

Answer: C

 

NO.7 You are evaluating convergence characteristics of various interior gateway protocols for a new

network design.

Which technology allows link-state routing protocols to calculate paths to destination prefixes that

are functionally similar to feasible successors in Enhanced Interior Gateway Routing Protocol?

A. Incremental Shortest Path First

B. Cisco Multiprotocol Label Switching Traffic Engineering Fast Reroute

C. Loop-Free Alternate Fast Reroute

D. partial route calculation

E. Fast-Flooding

Answer: C

 

NO.8 You are designing a wireless LAN with the following components:

-High-density indoor access point deployment

-2.4-GHz and 5-GHz radios

-802.11a, 802.11g, and 802.11n mode wireless LAN clients

Site survey results show negligible foreign WiFi and non-WiFi interference. What is the best method

to decrease duty cycle (radio frequency utilization) and increase overall wireless LAN client

performance for this design?

A. Disable all data rates below 12 Mb/s on all access points.

B. Decrease radio transmit power on all access points that report a high duty cycle.

C. Increase radio transmit power on all access points that report a high duty cycle.

D. Disable all data rates above 12 Mb/s on all access points.

E. Increase radio transmit power on all access points.

Answer: A