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300-101 Product Description:
Exam Number/Code: 300-101 vce
Exam name: Implementing Cisco IP Routing
n questions with full explanations
Certification: Cisco Certification
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Q61. Which common issue causes intermittent DMVPN tunnel flaps? 

A. a routing neighbor reachability issue 

B. a suboptimal routing table 

C. interface bandwidth congestion 

D. that the GRE tunnel to hub router is not encrypted 

Answer:

Explanation: 

DMVPN Tunnel Flaps Intermittently Problem DMVPN tunnel flaps intermittently. Solution

When DMVPN tunnels flap, check the neighborship between the routers as issues with neighborship

formation between routers may cause the DMVPN tunnel to flap. In order to resolve this problem, make

sure the neighborship between the routers is always up. Reference: http://www.cisco.com/c/en/us/support/

docs/security-vpn/ipsec-negotiation-ike- protocols/29240-dcmvpn.html#Prblm1


Q62. An engineer executes the ip flow ingress command in interface configuration mode. What is the result of this action? 

A. It enables the collection of IP flow samples arriving to the interface. 

B. It enables the collection of IP flow samples leaving the interface. 

C. It enables IP flow while disabling IP CEF on the interface. 

D. It enables IP flow collection on the physical interface and its subinterfaces. 

Answer:

Explanation: 


Q63. Which method allows IPv4 and IPv6 to work together without requiring both to be used for a single connection during the migration process? 

A. dual-stack method 

B. 6to4 tunneling 

C. GRE tunneling 

D. NAT-PT 

Answer:

Explanation: 

Dual stack means that devices are able to run IPv4 and IPv6 in parallel. It allows hosts to simultaneously

reach IPv4 and IPv6 content, so it offers a very flexible coexistence strategy. For sessions that support IPv6, IPv6 is used on a dual stack endpoint. If both

endpoints support IPv4 only, then IPv4 is used.

Benefits:

Native dual stack does not require any tunneling mechanisms on internal networks

Both IPv4 and IPv6 run independent of each other

Dual stack supports gradual migration of endpoints, networks, and applications. Reference: http://

www.cisco.com/web/strategy/docs/gov/IPV6at_a_glance_c45-625859.pdf


Q64. Refer to the exhibit. Which statement about the command output is true? 

A. The router exports flow information to 10.10.10.1 on UDP port 5127. 

B. The router receives flow information from 10.10.10.2 on UDP port 5127. 

C. The router exports flow information to 10.10.10.1 on TCP port 5127. 

D. The router receives flow information from 10.10.10.2 on TCP port 5127. 

Answer:

Explanation: 


Q65. Which statement about the use of tunneling to migrate to IPv6 is true? 

A. Tunneling is less secure than dual stack or translation. 

B. Tunneling is more difficult to configure than dual stack or translation. 

C. Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts. 

D. Tunneling destinations are manually determined by the IPv4 address in the low-order 32 bits of IPv4-compatible IPv6 addresses. 

Answer:

Explanation: 

Using the tunneling option, organizations build an overlay network that tunnels one protocol over the other

by encapsulating IPv6 packets within IPv4 packets and IPv4 packets within IPv6 packets. The advantage of this approach is that the new protocol can work without disturbing the old protocol, thus providing connectivity between users of the new protocol. Tunneling has two disadvantages, as discussed in RFC 6144: Users of the new architecture cannot use the services of the underlying infrastructure.

Tunneling does not enable users of the new protocol to communicate with users of the old protocol without

dual-stack hosts, which negates interoperability. 

Reference: http://www.cisco.com/c/en/us/products/

collateral/ios-nx-os-software/enterprise-ipv6- solution/white_paper_c11-676278.html


Q66. Which traffic characteristic is the reason that UDP traffic that carries voice and video is assigned to the queue only on a link that is at least 768 kbps? 

A. typically is not fragmented 

B. typically is fragmented 

C. causes windowing 

D. causes excessive delays for video traffic 

Answer:

Explanation: 



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