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Q121. Which two statements are characteristics of Ethernet private LAN circuits? (Choose two.) 

A. They support communication between two or more customer endpoints. 

B. They utilize more than one bridge domain. 

C. They support point-to-multipoint EVC. 

D. They support multipoint-to-multipoint EVC. 

Answer: A,D 

Explanation: 

An Ethernet Private LAN (EPLAN) is a multipoint–to–multipoint EVC. EPLAN is an EVC that supports communication between two or more UNIs. In EPLAN, only one EVC can exist on a port and the port can have only one EFP. 

Reference: https://www.cisco.com/c/en/us/td/docs/optical/cpt/r9_3/configuration/guide/cpt93_configurat ion/cpt93_configuration_chapter_0100.pdf 

Q122. DRAG DROP 

Drag and drop the EIGRP term on the left to the corresponding definition on the right. 

Answer: 

Q123. Refer to the exhibit. 

Which two statements are true? (Choose two.) 

A. This router is not 4-byte autonomous system aware. 

B. This router is 4-byte autonomous system aware. 

C. The prefix 10.100.1.1/32 was learned through an autonomous system number with a length of 4 bytes, and this router is 4-byte autonomous system aware. 

D. The prefix 10.100.1.1/32 was learned through an autonomous system number with a length of 4 bytes, and this router is not 4-byte autonomous system aware. 

E. The prefix 10.100.1.1/32 was originated from a 4-byte autonomous system. 

Answer: A,D 

Explanation: 

Prior to January 2009, BGP autonomous system (AS) numbers that were allocated to companies were 2-octet numbers in the range from 1 to 65535 as described in RFC 4271, A Border Gateway Protocol 4 (BGP-4). Due to increased demand for AS numbers, the Internet Assigned Number Authority (IANA) started to allocate four-octet AS numbers in the range from 65536 to 4294967295. RFC 5396, Textual Representation of Autonomous System (AS) Numbers, documents three methods of representing AS numbers. Cisco has implemented the following two methods: 

. Asplain — Decimal value notation where both 2-byte and 4-byte AS numbers are represented by their decimal value. For example, 65526 is a 2-byte AS number and 234567 is a 4-byte AS number. 

. Asdot — Autonomous system dot notation where 2-byte AS numbers are represented by their decimal value and 4-byte AS numbers are represented by a dot notation. For example, 65526 is a 2-byte AS number and 1.169031 is a 4-byte AS number (this is dot notation for the 234567 decimal number). 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/irg-4byte-asn.html 

Q124. How is the MRU for a multilink bundle determined? 

A. It is negotiated by LCP. 

B. It is manually configured on the multilink bundle. 

C. It is manually configured on all physical interfaces of a multilink bundle. 

D. It is negotiated by NCP. 

E. It is negotiated by IPCP. 

Answer:

Q125. Refer to the exhibit. 

Your network is suffering excessive output drops. Which two actions can you take to resolve the problem? (Choose two.) 

A. Install a switch with larger buffers. 

B. Configure a different queue set. 

C. Reconfigure the switch buffers. 

D. Configure the server application to use TCP. 

E. Update the server operating system. 

Answer: A,B 

Explanation: 

Installing a switch with larger buffers and correctly configuring the buffers can solve output queue problems. 

For each queue we need to configure the assigned buffers. The buffer is like the ‘storage’ space for the interface and we have to divide it among the different queues. This is how to do it: 

mls qos queue-set output <queue set> buffers Q1 Q2 Q3 Q4 

In this example, there is nothing hitting queue 2 or queue 3 so they are not being utilized. 

Q126. Refer to the exhibit. 

What is a reason for the RIB-failure? 

A. CEF is not enabled on this router. 

B. The route 10.100.1.1/32 is in the routing table, but not as a BGP route. 

C. The routing table has yet to be updated with the BGP route. 

D. The BGP route is filtered inbound and hence is not installed in the routing table. 

Answer:

Explanation: 

A rib-failure occurs when BGP tries to install the bestpath prefix into the RIB, but the RIB rejects the BGP route because a route with better administrative distance already exists in the routing table. An inactive Border Gateway Protocol (BGP) route is a route that is not installed in the RIB, but is installed in the BGP table as rib-failure. Example Topology Router 1 (R1) and router 2 (R2) have two parallel links; one links runs BGP AS 65535 and the other link runs Enhanced Interior Gateway Routing Protocol (EIGRP) AS 1. Both BGP and EIGRP are advertising the network 10.1.1.1/32 on R1. 

R2 learns about the 1.1.1.1/32 route through both EIGRP and BGP, but installs only the EIGRP route in the routing table because of the lower administrative distance. Since the BGP route is not installed in the R2 routing table, the route appears as a rib-failure in the R2 BGP table. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/116146-config-bgp-next-hop-00.html 

Q127. Which two DHCP messages are always sent as broadcast? (Choose two.) 

A. DHCPOFFER 

B. DHCPDECLINE 

C. DHCPRELEASE 

D. DHCPREQUEST 

E. DHCPDISCOVER 

Answer: D,E 

Explanation: 

DHCP discovery 

The client broadcasts messages DHCPDISCOVER on the network subnet using the destination address 255.255.255.255 or the specific subnet broadcast address. 

DHCP request 

In response to the DHCP offer, the client replies with a DHCP request, broadcasts to the server, requesting the offered address. A client can receive DHCP offers from multiple servers, but it will accept only one DHCP offer. 

Reference: http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol 

Q128. Which statement about the NHRP network ID is true? 

A. It is sent from the spoke to the hub to identify the spoke as a member of the same NHRP domain. 

B. It is sent from the hub to the spoke to identify the hub as a member of the same NHRP domain. 

C. It is sent between spokes to identify the spokes as members of the same NHRP domain. 

D. It is a locally significant ID used to define the NHRP domain for an interface. 

Answer:

Explanation: 

The NHRP network ID is used to define the NHRP domain for an NHRP interface and differentiate between multiple NHRP domains or networks, when two or more NHRP domains (GRE tunnel interfaces) are available on the same NHRP node (router). The NHRP network ID is used to help keep two NHRP networks (clouds) separate from each other when both are configured on the same router. The NHRP network ID is a local only parameter. It is significant only to the local router and it is not transmitted in NHRP packets to other NHRP nodes. For this reason the actual value of the NHRP network ID configured on a router need not match the same NHRP network ID on another router where both of these routers are in the same NHRP domain. As NHRP packets arrive on a GRE interface, they are assigned to the local NHRP domain in the NHRP network ID that is configured on that interface. 

Reference: 

http://www.cisco.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp.html 

Q129. Refer to the exhibit. 

Which statement about the R1 configuration is true? 

A. It permits host 10.1.1.2 to establish a Telnet connection to R1. 

B. It limits remote hosts to two SSH connection attempts. 

C. SSH connections to R1 will log out after a 5-minute idle interval. 

D. Hosts that reside on network 10.0.0.0/8 can SSH to R1. 

E. The R1 timeout for outgoing SSH connection attempts is 30 seconds. 

Answer:

Explanation: 

The timeout for outgoing SSH connection is defined by the “ip sshh time-out” command (in seconds), which is configured here as 30. 

Q130. Which statement about the BGP scope of the cost community is true? 

A. It is shared with IBGP neighbors only. 

B. It is shared with IBGP neighbors and route reflectors. 

C. It is shared with EBGP neighbors only. 

D. It is shared with IBGP and EBGP neighbors. 

E. It is shared with IBGP and confederation peers. 

Answer:

Explanation: 

The BGP Cost Community feature introduces the cost extended community attribute. The cost community is a non-transitive extended community attribute that is passed to internal BGP (iBGP) and confederation peers but not to external BGP (eBGP) peers. The cost community feature allows you to customize the local route preference and influence the best path selection process by assigning cost values to specific routes. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/s_bgpcc.html 

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