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Total 126 questions
Refer to the show command exhibit.
Which statement is true?
- A. It shows the result of the target configuration merged with the running configuration.
- B. It shows the contents of the uncommitted configuration.
- C. It shows the contents of the failed configuration.
- D. It shows the contents of the running configuration.
Answer : B
Explanation: Explanation/Reference:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.6/system_management/command/ref erence/yr36conf.pdf
To display information about the current configuration session (target configuration), use the show configuration command in any configuration mode. show configuration [merge] [running]
When is a route-policy configuration needed on a Cisco IOS XR router using RPL?
- A. when enabling an IGP routing protocol configuration
- B. when enabling an EBGP peering configuration
- C. when enabling an IBGP peering configuration
- D. when enabling route redistribution
- E. when enabling an LDP peering configuration
Answer : B
Explanation: Explanation/Reference:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/routing/configuration/guide/rc37rpl. pdf
Which IOS Software solution is used for transporting RFC 1918 networks via IPSec + GRE
VPNs over the internet?
- A. Dynamic Multipoint VPN
- B. Group Encrypted Transport VPN
- C. IPS
- D. URL Filtering
Answer : A
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 : B,D,E
What package provides the software for the route processor in the IOS XE Software?
- A. RPIOS
- B. ESPBase
- C. RPControl
- D. RPBase
- E. SIP SPA
Answer : D
Which two statements about carrier-grade NAT are true? (Choose two.)
- A. It conserves IPv4 addresses.
- B. A service provider issues private IP addresses to its customers.
- C. A service provider translates the private IP address of its customer to another private IP address.
- D. It is implemented on the CE and PE routers.
- E. It is designed to simplify IPv6 addressing.
Answer : A,B
Explanation: Explanation/Reference:
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r3.9.1/cg_nat/configuration/guid e/cgc391cgn.html#wp1268988
Carrier Grade NAT Overview -
Carrier Grade Network Address Translation (CGN) is a large scale NAT that is capable of providing private IPv4 to public IPv4 translation in the order of millions of translations to support several hundred thousand subscribers and bandwidth throughput of at least 10
Gbps full-duplex.
CGN is a workable solution to the IPv4 address depletion problem while offering a way for service provider subscribers and content providers to implement a graceful transition to
IPv6. CGN employs network address and port translation (NAPT) methods to aggregate many private IP addresses into fewer public IPv4 addresses. For example, a single public
IPv4 address with a pool of 32 K port numbers supports 320 individual private IP subscribers assuming each subscriber requires 100 ports (for example, each TCP connection needs one port number).
A CGN requires IPv6 to assist with the transition from IPv4 to IPv6.
Which BGP attribute is also used for loop prevention?
- A. weight
- B. local preference
- C. MED
- D. AS path
Answer : D
Explanation: Explanation/Reference:
As RFC 4271 says, "AS loop detection is done by scanning the full AS path (as specified in the AS_PATH attribute), and checking that the autonomous system number of the local system does not appear in the AS path".
Which IP addresses are matched by the permit 192.168.80.64 0.0.0.15 access-list entry?
- A. 192.168.80.64 to 192.168.80.255
- B. 192.168.80.64 to 192.168.80.96
- C. 192.168.80.64 to 192.168.80.95
- D. 192.168.80.64 to 192.168.80.80
- E. 192.168.80.64 to 192.168.80.79
Answer : E
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 : C,E
Explanation: Explanation/Reference:
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.
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-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 95 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 105 hsrp 2 preempt
- B. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.1 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 99 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 101 hsrp 2 preempt
- C. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 1 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 1 hsrp 2 preempt
- D. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 priority 105 standby 1 preempt standby 2 ip 192.0.2.254 standby 2 priority 95 standby 2 preempt
- E. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.254 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 preempt standby 2 ip 192.0.2.254 standby 2 preempt
- F. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 preempt standby 1 priority 2 standby 2 ip 192.0.2.254 standby 2 preempt standby 2 priority 2
Answer : A,D
On the Cisco ME 3400 switch, spanning tree is enabled by default on which type of switch port?
- A. UNI
- B. ENI
- C. NNI
- D. ENI and NNI
- E. UNI, ENI, and NNI
Answer : C
Explanation: Explanation/Reference:
http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_25_seg_s eg1/configuration/guide/swstpopt.html#wp1002608
On Cisco IOS XR software, what are the four valid address-family configuration command options in static route configuration mode? (Choose four.)
- A. address-family ipv4 unicast
- B. address-family ipv6 unicast
- C. address-family ipv4 multicast
- D. address-family ipv6 multicast
- E. address-family vpnv4
- F. address-family vpnv6
Answer : A,B,C,D
Explanation: Explanation/Reference:
Which statement about Cisco IOS XE software is true?
- A. It uses a two-stage configuration process.
- B. It is identical in look and feel to Cisco IOS software.
- C. It runs on the Cisco ASR 9010 platform.
- D. Packages can be added using the install add and install activate commands.
- E. It runs on the Cisco ME 3400 platform.
Answer : B
Explanation: Explanation/Reference:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps9442/ps11192/ps11194/QA_C67-
622903.html
The IOS feature set for routing and switching is unmatched in the industry, delivering functionality required for business critical applications. Preserving these advantages of IOS to our customers is critical for Cisco. IOS XE retains the exact same look and feel of IOS, while providing enhanced future-proofing and improved functionality. In IOS XE, IOS 15.0 runs as a single daemon within a modern Linux operating system. Additional system functions now run as additional, separate processes in the host OS environment. The operation, support and management of IOS XE does not require re-training from classic
IOS.
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