NEW QUESTION 1
A company begins offering SIP and PRI trunks to customers. Which type of Service Provider is this?

• A. Managed Service Provider
• B. Internet Service Provider
• C. Telecommunications Service Provider
• D. Distributed Networking Service Provider

Answer: C

NEW QUESTION 2
Which Cisco router platform supports running either the Cisco IOS or IOS XR operating system?

• A. Cisco CRS
• B. Cisco ASR9k
• C. Cisco ASR1K
• D. Cisco ISR-G2
• E. Cisco 12000 GSR

Answer: E

Explanation:

The CRS-1 platform natively runs the IOS XR operating system. The c12000 platform, originally being an IOS router, can be upgraded to run IOS XR. However, c12000 hardware, including line cards (LC) as well as route processors (RP), must be checked for XR compliance.
TURBOBOOT refers to a fresh boot of the router from ROMMON. TURBOBOOT is required if an IOS router is being converted to IOS XR or as a last resort disaster recovery in the case of CRS-1. If the router is already running an IOS XR image, there is no need to TURBOBOOT the router for an upgrade or downgrade. Later sections in this chapter address the upgrade scenario. This section deals with a fresh boot of the router from ROMMON. A new c12000 platform can be ordered prebaked as an IOS XR router; however, there will always be cases where an IOS running c12000 needs to install IOS XR.

NEW QUESTION 3
Which two statements about NAT64 are true? (Choose two.)

• A. NAT64 packets traverse two IPv4 addressing domains.
• B. NAT64 packets are translated two times.
• C. There are two types of NAT64 (stateful or stateless).
• D. NAT is performed by the CPE and also by the service provider edge router.
• E. The DNS64 server embeds the IPv4 address from the DNS A record with a preconfigured IPv6 translation prefix.

Answer: CE

Explanation:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6553/white_paper_c11- 676278.html
All viable translation scenarios are supported by NAT64, and therefore NAT64 is becoming the most sought translation technology. AFT using NAT64 technology can be achieved by either stateless or stateful means:
· Stateless NAT64, defined in RFC 6145, is a translation mechanism for algorithmically mapping IPv6 addresses to IPv4 addresses, and IPv4 addresses to IPv6 addresses. Like NAT44, it does not maintain any bindings or session state while performing translation, and it supports both IPv6- initiated and IPv4-initiated communications.
· Stateful NAT64, defined in RFC 6146, is a stateful translation mechanism for translating IPv6 addresses to IPv4 addresses, and IPv4 addresses to IPv6 addresses. Like NAT44, it is called stateful because it creates or modifies bindings or session state while performing translation. It supports both IPv6-initiated and IPv4-initiated communications using static or manual mappings. DNS64, an optional component defined in RFC 6147, when used in conjunction with NAT64, would trick the IPv6 hosts into thinking that the IPv4 destination as an IPv6 address, by synthesizing AAAA (quad A) resource records from A resource records.

NEW QUESTION 4
Select and Place:

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 5
On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0 interface that has an IPv4 IP address of 192.168.1.1/24?

• A. router ospf 1network 192.168.1.1 0.0.0.0 area 0
• B. router ospf 1network 192.168.1.1 255.255.255.255 area 0
• C. router ospf 1 area 0interface gi0/0/0/0
• D. router ospfv3 1network 192.168.1.1 0.0.0.0 area 0
• E. router ospfv3 1network 192.168.1.1 255.255.255.255 area 0
• F. router ospfv3 1 area 0network 192.168.1.0
• G. router ospfv3 1 area 0interface gi0/0/0/0

Answer: C

NEW QUESTION 6
Refer to the exhibit.

Which three statements about MPLS LDP operations are true?

• A. The incoming label for 10.2.10.1/32 is 16010 (which is allocated by the local router), and theoutgoing label is 22 (as advertised by the next-hop router).
• B. The 16003 and 16010 labels are learned from the 192.168.112.40 LDP neighbor.
• C. The ImpNull outgoing label for the 192.168.102.0/24 network means that the outgoing label should be removed when sending packets to the 192.168.112.40 next-hop router, when the incoming label is 16003.
• D. The ImpNull outgoing label for the 192.168.102.0/24 network means that the local router has not received a label for that network from its neighbor.
• E. The Unlabeled outgoing label for 10.10.10.100/32 indicates that a label pop is required when sending packets to the 10.10.10.1 next-hop router.
• F. The outgoing label of 22 for 10.2.10.1/32 is learned from the 192.168.112.40 LDP neighbor.

Answer: ACF

Explanation:
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ldp_221t.html

NEW QUESTION 7
On Cisco routers, the address-family configuration command in BGP configuration mode is used to enable which BGP feature?

• A. BGP route policy
• B. multiprotocol BGP
• C. BGP policy accounting
• D. BGP communities

Answer: B

NEW QUESTION 8
Which procedure is used as the last resort disaster recovery procedure to completely replace the currently installed IOS XR software on Cisco IOS XR routers?

• A. netboot
• B. turboboot
• C. install recovery
• D. install rollback
• E. install add and install activate

Answer: B

Explanation:
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.0/migration/guide/tbupgapp.pdf

NEW QUESTION 9
When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

• A. to copy the consolidated Cisco IOS XE image to the bootflash:
• B. to perform Cisco IOS ISSU on the standby route processor
• C. to run the router using a consolidated package
• D. to run the router using individual subpackages

Answer: D

Explanation:
http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/chassis/asrswcfg.pdf

NEW QUESTION 10





Hot Area:

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

vlan 80
Use the "show spanning-tree mst" command on each switch to see the vlans mapped to each MST.

NEW QUESTION 11
A customer has created a new VLAN for the subnet that was allocated to them. Computers on the subnets can ping their default gateway, but they cannot ping devices in the other subnet. What is most likely the problem?

• A. Firewall on the Provider Edge is blocking access
• B. InterVLAN routing is not configured
• C. BGP has not been configured with the Provider Edge router
• D. VLAN Switched Virtual Interface is in a down state

Answer: B

NEW QUESTION 12
Which type of service provider is responsible for offering backbone connectivity services to other service providers?

• A. CSP
• B. TSP
• C. NSP
• D. ISP
• E. ASP

Answer: C

Explanation:
http://www.cisco.com/web/about/ac79/docs/wp/sp/Service_Providers_as_Cloud_Providers_IBSG.pdf

NEW QUESTION 13
You want to configure HSRP between a Cisco IOS and a Cisco IOS XR router for the 192.0.2.0/24 subnet. Half of the PCs on the 192.0.2.0/24 subnet are configured to use 192.0.2.1 as the default gateway, and the other half of the PCs are configured to use 192.0.2.254 as the default gateway. The intent is to load balance the traffic across both routers.
Which two IOS and IOS XR configurations are needed? (Choose two.)

• A. ! IOS-XRinterface GigabitEthernet 0/0/0/0ip address 192.0.2.3 255.255.255.0router hsrpinterface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1hsrp 1 priority 95hsrp 1 preempthsrp 2 ipv4 192.0.2.254hsrp 2 priority 105hsrp 2 preempt
• B. ! IOS-XRinterface GigabitEthernet 0/0/0/0ip address 192.0.2.1 255.255.255.0router hsrpinterface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1hsrp 1 priority 99hsrp 1 preempthsrp 2 ipv4 192.0.2.254hsrp 2 priority 101hsrp 2 preempt
• C. ! IOS-XRinterface GigabitEthernet 0/0/0/0ip address 192.0.2.3 255.255.255.0router hsrpinterface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1hsrp 1 priority 1hsrp 1 preempthsrp 2 ipv4 192.0.2.254hsrp 2 priority 1hsrp 2 preempt
• D. ! IOSinterface GigabitEthernet 0/0ip address 192.0.2.2 255.255.255.0standby 1 ip 192.0.2.1standby 1 priority 105standby 1 preemptstandby 2 ip 192.0.2.254standby 2 priority 95standby 2 preempt
• E. ! IOSinterface GigabitEthernet 0/0ip address 192.0.2.254 255.255.255.0standby 1 ip 192.0.2.1standby 1 preemptstandby 2 ip 192.0.2.254standby 2 preempt
• F. ! IOSinterface GigabitEthernet 0/0ip address 192.0.2.2 255.255.255.0standby 1 ip 192.0.2.1standby 1 preemptstandby 1 priority 2standby 2 ip 192.0.2.254standby 2 preemptstandby 2 priority 2

Answer: AD

NEW QUESTION 14
Refer to the exhibit.

A network engineer configured BGP PE to CE neighbor sessions with the commands shown. What does 'address-family ipv4 vrf vrf-cisco' from the configuration allow?

• A. activates the advertisement of the IPv4 address family
• B. defines customer's routing context
• C. specifies a network and mask to announce in VRF-Cisco
• D. redistribute VRF-Cisco

Answer: B

NEW QUESTION 15
Refer to the exhibit.

A network engineer implemented these configurations. However, Intermediate System-to- Intermediate System (IS-IS) neighbors are unable to establish. What is the reason for this error?

• A. missing router IS-IS x command
• B. missing IP router IS-IS command
• C. missing network mask
• D. missing network statement
• E. missing MTU matching value

Answer: B

NEW QUESTION 16
Select and Place:

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 17
What are three common problems related to sessions not establishing between iBGP neighbors? (Choose three.)

• A. Incorrect MAC-address configured
• B. Unable to reach IP
• C. Network is not configured under router bgp x configuration
• D. Access list
• E. Firewall blocking all TCP traffic
• F. Redistribution is not configured under router bgp x configuration

Answer: BDE

NEW QUESTION 18
Which three are common ISP access network technologies? (Choose three.)

• A. DSL
• B. Cable modem
• C. DWDM
• D. MPLS
• E. PON
• F. MP-BGP

Answer: ABE

Explanation:
http://blog.ioshints.info/2010/02/passive-optical-networks.html- PON

NEW QUESTION 19
Which commands will configure the spanning tree operating mode that can group multiple VLANs in a single domain?

• A. switch(config)#spanning-tree mode pvst
• B. switch(config)#spanning-tree mode rstp
• C. switch(config)#spanning-tree mode rapid-pvst
• D. switch(config)#spanning-tree mode mst
• E. switch(config)#spanning-tree mode mst-plus

Answer: D

NEW QUESTION 20
Which two statements about NAT444 are true? (Choose two.)

• A. NAT444 packets are translated three times.
• B. NAT packets traverse three IPv4 addressing domains.
• C. NAT444 needs to work together with DNS64.
• D. There are two types of NAT444 (stateful or stateless).
• E. NAT is performed by the CPE and also by the service provider router.

Answer: BE

Explanation:

Carrier-grade NAT (CGN), also known as large-scale NAT (LSN), is an approach to IPv4 network design in which end sites, in particular residential networks, are configured with private network addresses that are translated to public IPv4 addresses by middlebox network address translator devices embedded in the network operator's network, permitting the sharing of small pools of public addresses among many end sites. This shifts the NAT function and configuration thereof from the
customer premises to the Internet service provider network. Carrier-grade NAT has been proposed as an approach for mitigating IPv4 address exhaustion.[1] Critics of carrier-grade NAT argue the following aspects:
Like any form of NAT, it breaks the end-to-end principle.[2] It has significant security, scalability, and reliability problems, by virtue of being stateful. It makes record keeping for law-enforcement operations more difficult.
It makes it impossible to host services on well known ports. It does not solve the IPv4 address exhaustion problem when a routable IP address is needed, such as in web hosting.
One use scenario of CGN can be described as NAT444,[3] because some customer's connections to public servers would pass through three different IPv4 addressing domains: the customer's own private network, the carrier's private network, and the public Internet. Another CGN scenario is Dual-Stack Lite, in which the carrier's network uses IPv6 and thus only two IPv4 addressing domains are needed.

NEW QUESTION 21
During the BGP route selection process on Cisco routers, which BGP attribute is examined first, to determine the best path to use?

• A. AS path
• B. MED
• C. local preference
• D. weight
• E. origin

Answer: D

NEW QUESTION 22
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