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Far out 300-101 CCDP free question (Nov 2016)

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Avant-garde 300-101 Simple Questions Latest Practice Test Questions VCE PDF Dumps

Qustion No. 1

Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two.) 

A. DNS 

B. NAT 

C. port redirection 

D. stateless translation 

E. session handling 

Answer: A,B 

Explanation: 

Network Address Translation IPv6 to IPv4, or NAT64, technology facilitates communication

between IPv6-only and IPv4-only hosts and networks (whether in a transit, an access, or an edge

network). This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously

handling IPv4 address depletion. The DNS64 and NAT64 functions are completely separated, which is

essential to the superiority of NAT64 over NAT-PT. Reference: http:// www.cisco.com/c/en/us/products/

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

 

Qustion No. 2

Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection?

 

A. Frame Relay inverse ARP 

B. static DLCI mapping 

C. Frame Relay broadcast queue 

D. dynamic DLCI mapping 

Answer: A 

Explanation: 

Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a

specific connection, given its known DLCI. Responses to

Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server; the

table is then used to supply the next-hop protocol

address or the DLCI for outgoing traffic.

Reference:

http://www.cisco.com/c/en/us/td/docs/ios/12_2/wan/configurat...

 

Qustion No. 3

After you review the output of the command show ipv6 interface brief, you see that several IPv6 addresses have the 16-bit hexadecimal value of "FFFE" inserted into the address. Based on this information, what do you conclude about these IPv6 addresses? 

A. IEEE EUI-64 was implemented when assigning IPv6 addresses on the device. 

B. The addresses were misconfigured and will not function as intended. 

C. IPv6 addresses containing "FFFE" indicate that the address is reserved for multicast. 

D. The IPv6 universal/local flag (bit 7) was flipped. 

E. IPv6 unicast forwarding was enabled, but IPv6 Cisco Express Forwarding was disabled. 

Answer: A 

Explanation: 

Extended Unique Identifier (EUI), as per RFC2373, allows a host to assign iteslf a unique 64-

Bit IP Version 6 interface identifier (EUI-64). This feature is a key benefit over IPv4 as it eliminates the

need of manual configuration or DHCP as in the world of IPv4. The IPv6 EUI-64 format address is obtained

through the 48-bit MAC address. The Mac address is first separated into two 24-bits, with one being OUI

(Organizationally Unique Identifier) and the other being NIC specific. The 16-bit 0xFFFE is then inserted

between these two 24-bits to for the 64-bit EUI address. IEEE has chosen FFFE as a reserved value which

can only appear in EUI-64 generated from the an EUI-48 MAC address. Here is an example showing how

a the Mac Address is used to generate EUI.

Next, the seventh bit from the left, or the universal/local (U/L) bit, needs to be inverted. This bit identifies whether this interface identifier is universally or locally administered. If 0, the address is locally

administered and if 1, the address is globally unique. It is worth noticing that in the OUI portion, the globally

unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses

has 1 configured. Therefore, when the bit is inverted, it maintains its original scope (global unique address

is still global unique and vice versa). The reason for inverting can be found in RFC4291 section 2.5.1.

Once the above is done, we have a fully functional EUI-64 format address. 

Reference: https://

supportforums.cisco.com/document/100566/understanding-ipv6-eui-64-bit- address

 

Qustion No. 4

Which three characteristics are shared by subinterfaces and associated EVNs? (Choose three.) 

A. IP address 

B. routing table 

C. forwarding table 

D. access control lists 

E. NetFlow configuration 

Answer: A,B,C 

Explanation: 

A trunk interface can carry traffic for multiple EVNs. To simplify the configuration process, all

the subinterfaces and associated EVNs have the same IP address assigned. In other words, the trunk

interface is identified by the same IP address in different EVN contexts. This is accomplished as a result of

each EVN having a unique routing and forwarding table, thereby enabling support for overlapping IP

addresses across multiple EVNs. Reference: http://www.cisco.com/en/US/docs/ios-xml/ios/evn/

configuration/xe-3sg/evn- overview.pdf

 

Qustion No. 5

For security purposes, an IPv6 traffic filter was configured under various interfaces on the local router. However, shortly after implementing the traffic filter, OSPFv3 neighbor adjacencies were lost. What caused this issue? 

A. The traffic filter is blocking all ICMPv6 traffic. 

B. The global anycast address must be added to the traffic filter to allow OSPFv3 to work properly. 

C. The link-local addresses that were used by OSPFv3 were explicitly denied, which caused the neighbor relationships to fail. 

D. IPv6 traffic filtering can be implemented only on SVIs. 

Answer: C 

Explanation: 

OSPFv3 uses link-local IPv6 addresses for neighbor discovery and other features, so if any IPv6 traffic

filters are implemented be sure to include the link local address so that it is permitted in the filter list.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/... os/unicast/configuration/

guide/l3_cli_nxos/l3_ospfv3.html

 

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