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Q301. Which two statements about Layer 2 Frame Prioritization bits are true? (Choose two.) 

A. 802.1Q frame headers carry the CoS value in the three most-significant bits of the 2-byte Tag Control Information field. 

B. ISL frame headers carry an IEEE 802.1P CoS value in the three least-significant bits of the 2-byte User field. 

C. ISL frame headers carry an IEEE 802.1P CoS value in the three most-significant bits of the 1-byte User field. 

D. On 802.1Q trunks, traffic in the native VLAN is carried in 802.1Q frames. 

E. Only 802.1Q and ISL frame types can carry CoS information. 

F. On 802.1Q trunks, traffic in the native VLAN is carried in 802.1P frames. 

Answer: A,E 


Q302. Refer to the exhibit. 

R2 is configured as the R1 neighbor in area 51, but R2 fails to receive the configured summary route. Which action can you take to correct the problem? 

A. Replace the summary-address command with the area-range command. 

B. Configure a summary address under R1interface GigabitEthernet0/0. 

C. Configure a summary address under R1 interface GigabitEthernet1/0. 

D. Configure the no discard-route command in the OSPF process of R1. 

E. Configure ip ospf network broadcast under the Loopback0 interface of R1. 

Answer:


Q303. What are the two requirements for BGP to install a classful network into the BGP routing table? (Choose two) 

A. The AS contains the entire classfull network. 

B. A classful network statement with a lower administrative distance is in the routing table. 

C. Auto-summary is enabled. 

D. A classful network statement with a classful mask is in the routing table. 

E. Synchronization is enabled. 

F. Synchronization is disabled. 

Answer: C,D 


Q304. Refer to the exhibit. 

Which statement is true? 

A. The command ip multicast rpf multitopology is missing from the configuration. 

B. Multitopology routing for multicast has been enabled for IS-IS. 

C. This output is invalid. 

D. The command mpls traffic-eng multicast-intact is configured on this router. 

Answer:

Explanation: 

The following is sample output from the show ip rpf command in a Multi-Topology Routing (MTR) routing environment. In Cisco IOS releases that support MTR, the “RPF topology” field was introduced to indicate which RIB topology is being used for the RPF lookup. For the “RPF topology” field in this example, the first topology listed (ipv4 multicast base) indicates where the nexthop of the RPF lookup is being conducted and the second topology listed (ipv4 unicast data) indicates where the route originated from. 

Router# show ip rpf 10.30.30.32 

RPF information for ? (10.30.30.32) 

RPF interfacE. Ethernet1/0 

RPF neighbor: ? (10.1.1.32) 

RPF route/mask: 10.30.30.32/32 

RPF typE. unicast (ospf 100) 

Doing distance-preferred lookups across tables 

RPF topology: ipv4 multicast base, originated from ipv4 unicast data 

The table below describes the fields shown in the displays. 

Table 15 show ip rpf Field Descriptions 

Field 

Description 

RPF information for 

Hostname and source address for which RPF information is displayed. 

RPF interface 

For the given source, the interface from which the router expects to receive packets. 

RPF neighbor 

For the given source, the neighbor from which the router expects to receive packets. 

RPF route/mask 

Route number and mask that matched against this source. 

RPF type 

Routing table from which this route was obtained, either unicast, MBGP, DVMRP, or static mroutes. 

RPF recursion count 

The number of times the route is recursively resolved. 

Doing distance-preferred 

Whether RPF was determined based on distance or length of mask. 

Using Group Based VRF Select, RPF VRF. 

The RPF lookup was based on the group address and the VRF where the RPF lookup is being performed. 

Metric preference 

The preference value used for selecting the unicast routing metric to the RP announced by the designated forwarder (DF). 

Metric 

Unicast routing metric to the RP announced by the DF. 

RPF topology 

RIB topology being used for the RPF lookup, and, if originated from a different RIB topology, which RIB topology the route originated from. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-xe-3se-5700-cr-book/imc-xe-3se-3850-cr-book_chapter_010.html 


Q305. An engineer has configured a router to use EUI-64, and was asked to document the IPv6 address of the router. The router has the following interface parameters: 

mac address C601.420F.0007 

subnet 2001:DB8:0:1::/64 

A. 2001:DB8:0:1:C601:42FF:FE0F:7 

B. 2001:DB8:0:1:FFFF:C601:420F:7 

C. 2001:DB8:0:1:FE80:C601:420F:7 

D. 2001:DB8:0:1:C601:42FE:800F:7 

Answer:


Q306. Which data plane protocol does EIGRP Over the Top use? 

A. MPLS 

B. GRE 

C. LISP 

D. IP-in-IP 

Answer:

Explanation: 

The EIGRP Over the Top solution can be used to ensure connectivity between disparate Enhanced Interior Gateway Routing Protocol (EIGRP) sites. This feature uses EIGRP on the control plane and Locator ID Separation Protocol (LISP) encapsulation on the data plane to route traffic across the underlying WAN architecture. EIGRP is used to distribute routes between customer edge (CE) devices within the network, and the traffic forwarded across the WAN architecture is LISP encapsulated. Therefore, to connect disparate EIGRP sites, you must configure the neighbor command with LISP encapsulation on every CE in the network. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/ire-xe-3s-book/ire-eigrp-over-the-top.html 


Q307. Which two values are needed to configure NTP authentication? (Choose two.) 

A. the encryption method 

B. the key number 

C. the burst mode 

D. the key string 

E. the Diffie-Hellman group 

Answer: B,D 


Q308. Which two statements about EIGRP load balancing are true? (Choose two.) 

A. EIGRP supports 6 unequal-cost paths. 

B. A path can be used for load balancing only if it is a feasible successor. 

C. EIGRP supports unequal-cost paths by default. 

D. Any path in the EIGRP topology table can be used for unequal-cost load balancing. 

E. Cisco Express Forwarding is required to load-balance across interfaces. 

Answer: A,B 


Q309. DRAG DROP 

Drag and drop each BGP feature on the left to the corresponding function it performs on the right. 

Answer: 


Q310. Which field is specific to the OPSFv3 packet header, as opposed to the OSPFv2 packet header? 

A. checksum 

B. router ID 

C. AuType 

D. instance ID 

Answer:

Explanation: 

In OSPFv3, Instance ID is a new field that is used to have multiple OSPF process’ instance per link. By default it is 0 and for any additional instance it is increased, instance ID has local link significance only. OSPFv3 routers will only become neighbors if the instanceIDs match. It is thus possible to have multiple routers on a broadcast domain and all run Ospfv3 but not all of them becoming neighbors. 

Reference: https://supportforums.cisco.com/document/97766/comparing-ospfv3-ospfv2-routing-protocol