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Q21. Two switches are connected back-to-back using two Gigabit Ethernet interfaces. These two interfaces are assigned to a port channel in VLAN trunk mode. Which configuration sequence allows the addition of a new VLAN in this link? 

A. Add the VLAN to the port channel only, and remove it from the individual links. 

B. Add the VLAN to both the port channel and individual links. 

C. Add the VLW to the port channel only, and it will be reflected on the individual links. 

D. Add the VLAN to the individual links, and it will be reflected on the port channel. 

Answer: C 


Q22. BGP best route selection process is based on what? 

A. path attributes 

B. lowest cost 

C. highest bandwidth 

D. lowest delay 

E. lowest hop-count 

Answer: A 


Q23. Refer to the exhibit. 

The NOC engineer noticed that the R2 router system clock is not updated and synchronized to the NTP server that is configured on the R10 router. What is the issue? 

A. The access list NTP_Clients is missing. 

B. The access group is misconfigured. 

C. The maximum number of peers and client associations is exceeded. 

D. The authentication key is mismatched. 

E. The PE2 router should be configured as an NTP peer instead of as a client. 

Answer: C 


Q24. A network engineer wants to deploy a solution that allows for 200 DS1 s and 100 DS0s that are multiplexed to a single interface on a Cisco 7600 Series Router. Which interface type satisfies this requirement? 

A. Channelized T3/E3 (DS0) 

B. Channelized OC-12/STM-4 

C. OC-12/STM-4 

D. OC-48c/STM-16 

Answer: B 


Q25. Which are the two fundamental ways in which IEEE 1588 differs from SyncE? (Choose two.) 

A. In addition to frequency synchronization, it achieves ToD synchronization to achieve phase alignment which is required for multi-channel communication. 

B. It is a purely-based solution, with the actual clock values being passed inside the payloads of special packets dedicated to that task. 

C. It offers two major changes over traditional Ethernet to make it suitable for clock distribution: a mandated clock accuracy and the ESMC protocol for clock selection, distribution, management, traceability, and failover. 

D. SyncE is a Cisco proprietary ToD technology where IEEE 1588 is a industry standard recommended for interoperability across vendor devices. 

E. IEEE 1588 applies to voice-only systems or with low-bandwidth data traffic. 

Answer: A,B 

Explanation: http://www.eetimes.com/document.asp?doc_id=1278660 


Q26. DRAG DROP 

Drag and drop the subslot of the SIP-800 card that is used on Cisco CRS routers on the left to the correct PUM ASIC process on the right. 

Answer: 


Q27. In which way does the DS-Lite IPv6 transitioning mechanism differ from IPv6 Dual-Stack? 

A. DS-Lite is a combination of tunnel and translation technologies. 

B. DS-Lite is a transition technology that gives full IPv6 connectivity for IPv6 capable hosts that are on the IPv4 Internet but have no native connection to an IPv6 network. 

C. DS-Lite is an automatic tunnel where the tunnel destination is determined by the IPv4 address extracted from the IPv6 address that starts with the prefix 2002::/16. 

D. DS-Lite is a stateless tunneling mechanism with a lightweight and secure manner without requiring upgrades to existing IPv4 access network infrastructure. 

Answer: A 

Explanation: http://www.cisco.com/c/en/us/products/collateral/service-provider/carrier-grade-ipv6-solution/white_paper_c11-558744-00.html 


Q28. Which is one difference between H-VPLS and VPLS? 

A. VPLS is a point-to-point Layer-2 services and H-VPLS is a multipoint Layer-2 services. 

B. H-VPLS reduces signaling overhead and packet replication requirements for the provider edge. 

C. VPLS improve scalability concerns identified on H-VPLS implementation. 

D. H-VPLS connects using also other Layer-2 encapsulation such as PPP and VPLS connects using Ethernet encapsulation only 

Answer: B 


Q29. Refer to the exhibit: 

Which Cisco IOS XE configuration method allocates a label for prefixes with a /32 subnet mask only? 

A. Option 1 

B. Option 2 

C. Option 3 

D. Option 4 

Answer: A 


Q30. What is NETCONF? 

A. It is a standard for installing, manipulating and deleting configuration of network devices. 

B. it is a Cisco proprietary solution to help remove the time, cost and manual steps involved in network element configuration. 

C. It is data modeling language, to help remove the time, cost and manual steps involved in network element configuration. 

D. It is a new recommendation which writes device specific CLI scripts while keeping flexibility in a vendor dependence environment. 

Answer: A 

Explanation: http://www.tail-f.com/education/what-is-netconf/