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Q151. Which two statements are true about an EPL? (Choose two.)
A. It is a point-to-point Ethernet connection between a pair of NNIs.
B. It allows for service multiplexing.
C. It has a high degree of transparency.
D. The EPL service is also referred to as E-line.
Answer: C,D
Explanation:
Ethernet private line (EPL) and Ethernet virtual private line (EVPL) are carrier Ethernet data services defined by the Metro Ethernet Forum. EPL provides a point-to-point Ethernet virtual connection (EVC) between a pair of dedicated user–network interfaces (UNIs), with a high degree of transparency. EVPL provides a point-to-point or point-to-multipoint connection between a pair of UNIs. The services are categorized as an E-Line service type, with an expectation of low frame delay, frame delay variation and frame loss ratio. EPL is implemented using a point-to-point (EVC) with no Service Multiplexing at each UNI (physical interface), i.e., all service frames at the UNI are mapped to a single EVC (a.k.a. all-to-one bundling).
Reference: http://en.wikipedia.org/wiki/Ethernet_Private_Line
Q152. What are the minimal configuration steps that are required to configure EIGRP HMAC-SHA2 authentication?
A. classic router mode, interface XX, authentication mode hmac-sha-256 <password>
B. named router mode, address-family statement, authentication mode hmac-sha-256 <password>
C. named router mode, address-family statement, af-interface default, authentication mode hmac-sha-256 <password>
D. named router mode, address-family statement, authentication mode hmac-sha-256 <password>
Answer: C
Explanation:
The example below shows how to configure EIGRP HMAC-SHA2 on Cisco router:
Device(config)# router eigrp name1
Device(config-router)# address-family ipv4 autonomous-system 45000
Device(config-router-af)# af-interface ethernet 0/0
Device(config-router-af-interface)# authentication mode hmac-sha-256 0 password1
Device(config-router-af-interface)# end
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-sy/ire-15-sy-book/ire-sha-256.html
Q153. Which statement describes the difference between a stub area and a totally stub area?
A. The ABR advertises a default route to a totally stub area and not to a stub area.
B. Stub areas do not allow LSA types 4 and 5, while totally stub areas do not allow LSA types 3, 4, and 5.
C. Totally stub areas allow limited external routes in the area via a special type 7 LSA, while stub areas do not.
D. Stub areas do not allow external LSAs, ASBR summary LSAs, or summary LSAs with the exception of a default route originated by the ABR via a summary LSA.
Answer: B
Explanation:
. Standard areas can contain LSAs of type 1, 2, 3, 4, and 5, and may contain an ASBR. The backbone is considered a standard area.
. Stub areas can contain type 1, 2, and 3 LSAs. A default route is substituted for external routes.
. Totally stubby areas can only contain type 1 and 2 LSAs, and a single type 3 LSA. The type 3 LSA describes a default route, substituted for all external and inter-area routes.
. Not-so-stubby areas implement stub or totally stubby functionality yet contain an ASBR. Type 7 LSAs generated by the ASBR are converted to type 5 by ABRs to be flooded to the rest of the OSPF domain.
Reference: http://packetlife.net/blog/2008/jun/24/ospf-area-types/
Q154. What are two reasons to define static peers in EIGRP? (Choose two.)
A. Security requirements do not allow dynamic learning of neighbors.
B. The link between peers requires multicast packets.
C. Back-level peers require static definition for successful connection.
D. The link between peers requires unicast packets.
Answer: A,D
Explanation:
There are two ways we can create EIGRP neighbor relationship:
+ Use “network ” command. This is the more popular way to create EIGRP neighbor relationship. That router will check which interfaces whose IP addresses belong to the and turn EIGRP on that interface. EIGRP messages are sent via multicast packets.
+ Use “neighbor” commanD. The interface(s) that have this command applied no longer send or receive EIGRP multicast packets. EIGRP messages are sent via unicast. The router only accepts EIGRP packets from peers that are explicitly configured with a neighbor statement. Consequently, any messages coming from routers without a corresponding neighbor statement are discarded. This helps prevent the insertion of unauthorized routing peers -> A and D are correct.
Q155. DRAG DROP
Drag and drop each MLPPP command on the left to the function it performs on the right.
Answer:
Q156. Which three protocols can use enhanced object tracking? (Choose three.)
A. HSRP
B. Proxy-ARP
C. VRRP
D. GLBP
E. NTP
F. DHCP
Answer: A,C,D
Explanation:
The Enhanced Object Tracking feature separates the tracking mechanism from HSRP and creates a separate standalone tracking process that can be used by other processes and HSRP. This feature allows tracking of other objects in addition to the interface line-protocol state. A client process such as HSRP, Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP), can register its interest in tracking objects and then be notified when the tracked object changes state.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/15-mt/iap-15-mt-book/iap-eot.html
Q157. Refer to the exhibit.
Which two pieces of information in this Wireshark capture indicate that you are viewing EIGRP traffic? (Choose two.)
A. the header length
B. the protocol number
C. the destination address
D. the Class Selector
E. the source address
F. the header checksum
Answer: B,C
Explanation:
EIGRP uses protocol number 88, which shows as EIGRP in the capture. Also, we in the capture that the destination IP address is 224.0.0.10, which is the Enhanced Interior Gateway Routing Protocol (EIGRP) group address is used to send routing information to all EIGRP routers on a network segment.
Q158. Which three statements are true about VSS? (Choose three.)
A. VSS separates the control planes of the active and the standby chassis.
B. Configuration changes can be made on both active and standby chassis.
C. When the VSS active chassis recovers after a failure, it initiates a switchover and takes on the active role again.
D. VSS unifies the control planes of the active and the standby chassis.
E. HSRP configuration is not required to run VSS.
F. The VSS standby chassis monitors the VSS active chassis using the VSL.
Answer: D,E,F
Explanation:
VSS operates on a unified control plane with a distributed forwarding architecture in which the active supervisor (or switch) is responsible for actively participating with the rest of the network and for managing and maintaining control plane information. VSS actually removes the need for a next-hop redundancy protocol like HSRP or VRRP. These first-hop redundancy protocols are usually heavily tied to a fast-converging routing protocol like EIGRP, and still require that each device maintain its own control plane. The standby chassis monitors the active chassis using the VSL. If it detects failure, the standby chassis initiates a switchover and takes on the active role. When the failed chassis recovers, it takes on the standby role.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-1SY/config_guide/sup2T/15_1_sy_swcg_2T/virtual_switching_systems.pdf
Q159. You are configuring a DMVPN spoke to use IPsec over a physical interface that is located within a VRF. For which three configuration sections must you specify the VRF name? (Choose three.)
A. the ISAKMP profile
B. the crypto keyring
C. the IPsec profile
D. the IPsec transform set
E. the tunnel interface
F. the physical interface
Answer: B,E,F
Explanation:
ip vrf forwardingvrf-name
Example:
Router(config-if)# ip vrf forwarding green
Associates a virtual private network (VPN) routing and forwarding (VRF) instance with an interface or subinterface.
. vrf-name is the name assigned to a VRF.
Router(config-if)# tunnel vrfvrf-name
Example:
Router(config-if)# tunnel vrf finance1
Associates a VPN routing and forwarding (VRF) instance with a specific tunnel destination. vrf-name is the name assigned to a VRF.
Router(config)# crypto keyringkeyring-name [vrf fvrf-name]
Defines a crypto keyring to be used during IKE authentication and enters keyring configuration mode.
. keyring-name—Name of the crypto keyring.
. fvrf-name—(Optional) Front door virtual routing and forwarding (FVRF) name to which the keyring will be referenced. fvrf-name must match the FVRF name that was defined during virtual routing and forwarding (VRF) configuration
Q160. Refer to the exhibit.
Which LISP component do routers in the public IP network use to forward traffic between the two networks?
A. EID
B. RLOC
C. map server
D. map resolver
Answer: B
Explanation:
Locator ID Separation Protocol (LISP) is a network architecture and protocol that implements the use of two namespaces instead of a single IP address:
. Endpoint identifiers (EIDs)—assigned to end hosts.
. Routing locators (RLOCs)—assigned to devices (primarily routers) that make up the global routing system. The public networks use the RLOC to forward traffic between networks.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_lisp/configuration/15-mt/irl-15-mt-book/irl-overview.html
