2016NEW Cisco.CCIE.(400-101)EXAM] CCIE Routing and Switching EXAM A PART11 (221-240) VCE DUMPS FOR FREE DOWNLOAD WITH 100%PASS ENSURE

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QUESTION 221

Which option is the default number of routes over which EIGRP can load balance?

A. 1

B. 4

C. 8

D. 16

Correct Answer: B

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

By default, EIGRP load-shares over four equal-cost paths. For load sharing to happen, the routes to load-share over must show up in the IP forwarding table or

with the show ip route command. Only when a route shows up in the forwarding table with multiple paths to it will load sharing occur.

Reference. http://www.informit.com/library/content.aspx?

b=CCIE_Practical_Studies_I&seqNum=126

QUESTION 222

When EIGRP is used as the IPv4 PE-CE protocol, which two requirements must be configured before the BGP IPv4 address family can be configured? (Choose

two.)

A. the route distinguisher

B. the virtual routing and forwarding instance

C. the loopback interface

D. the router ID

Correct Answer: AB

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:A VRF must be created, and a route distinguisher and route target must be configured in order for the PE routers in the BGP network to carry EIGRP routes to the

EIGRP CE site. The VRF must also be associated with an interface in order for the PE router to send routing updates to the CE router.

Prerequisites

Before this feature can be configured, MPLS and CEF must be configured in the BGP network, and multiprotocol BGP and EIGRP must be configured on all PE

routers that provide VPN services to CE routers.

Reference.

http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/seipecec.html#wp1083316

QUESTION 223

Which three EIGRP packet types are valid? (Choose three.)

A. open

B. notification

C. keep-alive

D. hello

E. query

F. reply

Correct Answer: DEF

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

EIGRP uses the following packet types: hello and acknowledgment, update, and query and reply. Hello packets are multicast for neighbor discovery/recovery and

do not require acknowledgment. An acknowledgment packet is a hello packet that has no data. Acknowledgment packets contain a nonzero acknowledgment

number and always are sent by using a unicast address.

Update packets are used to convey reachability of destinations. When a new neighbor is discovered, unicast update packets are sent so that the neighbor can

build up its topology table. In other cases, such as a link-cost change, updates are multicast. Updates always are transmitted reliably.

Query and reply packets are sent when a destination has no feasible successors. Query packets are always multicast. Reply packets are sent in response to

query packets to instruct the originator not to recompute the route because feasible successors exist. Reply packets are unicast to the originator of the query. Both

query and reply packets are transmitted reliably.

Reference. http://docwiki.cisco.com/wiki/Enhanced_Interior_Gateway_Routing_Protocol

QUESTION 224

Which term describes an EIGRP route that has feasible successors?

A. activeB. passive

C. redistributed

D. invalid

Correct Answer: B

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

A topology table entry for a destination can have one of two states. A route is considered in the Passive state when a router is not performing a route

recomputation. The route is in Active state when a router is undergoing a route recomputation. If there are always feasible successors, a route never has to go into

Active state and avoids a route recomputation.

When there are no feasible successors, a route goes into Active state and a route recomputation occurs. A route recomputation commences with a router sending

a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that

they are performing a route recomputation. While in Active state, a router cannot change the next-hop neighbor it is using to forward packets. Once all replies are

received for a given query, the destination can transition to Passive state and a new successor can be selected.

Reference. http://docwiki.cisco.com/wiki/Enhanced_Interior_Gateway_Routing_Protocol

QUESTION 225

Refer to the exhibit.

If EIGRP is configured between two routers as shown in this output, which statement about their EIGRP relationship is true?

A. The routers will establish an EIGRP relationship successfully.

B. The routers are using different authentication key-strings.

C. The reliability metric is enabled.

D. The delay metric is disabled.

Correct Answer: C

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

The 5 K values used in EIGRP are:

K1 = Bandwidth modifier

K2 = Load modifier

K3 = Delay modifierK4 = Reliability modifier

K5 = Additional Reliability modifier

However, by default, only K1 and K3 are used (bandwidth and delay). In this output we see that K1, K3, and K4 (Reliability) are all set.

QUESTION 226

Which type of OSPF packet is an OSPF link state update packet?

A. type 1

B. type 2

C. type 3

D. type 4

E. type 5

Correct Answer: D

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

Link State Update packets are OSPF packet type 4. These packets implement the flooding of link state advertisements. Each Link State Update packet carries a

collection of link state advertisements one hop further from its origin. Several link state advertisements may be included in a single packet.

Reference. http://www.freesoft.org/CIE/RFC/1583/107.htm

QUESTION 227

If two OSPF type 3 prefixes have the same metric, and are within the same process, which prefix(es) are installed into the routing table?

A. The route whose originator has the lower router ID.

B. Both routes are installed.

C. The route whose originator has the higher router ID.

D. The first route that is learned.

Correct Answer: B

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:OSPF allows multiple equal-cost paths to the same destination. Since all link-state information is flooded and used in the SPF calculation, multiple equal cost

paths can be computed and used for routing, and each route will be installed in the routing table.

QUESTION 228

Which OSPF feature supports LSA rate limiting in milliseconds to provide faster convergence?

A. LSA throttling

B. incremental SPF

C. fast hello

D. SPF tuning

Correct Answer: A

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

The OSPF Link-State Advertisement (LSA) Throttling feature provides a dynamic mechanism to slow down link-state advertisement (LSA) updates in OSPF during

times of network instability. It also allows faster Open Shortest Path First (OSPF) convergence by providing LSA rate limiting in milliseconds.

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

QUESTION 229

Which two options are BGP attributes that are updated when router sends an update to its eBGP peer? (Choose two.)

A. weight

B. local preference

C. AS_path

D. next-hop

Correct Answer: CD

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

AS_Path describes the inter-AS path taken to reach a destination. It gives a list of AS Numbers traversed when reaching to a destination. Every BGP speaker

when advertising a route to a peer will include its own AS number in the NLRI. The subsequent BGP speakers who advertise this route will add their own AS

number to the AS_Path, the subsequent AS numbers get prepended to the list. The end result is the AS_Path attribute is able to describe all the autonomoussystems it has traversed, beginning with the most recent AS and ending with the originating AS.

NEXT_HOP Attribute specifies the next hop IP address to reach the destination advertised in the NLRI. NEXT_HOP is a well-known mandatory attribute that is

included in every eBGP update.

Reference. http://netcerts.net/bgp-path-attributes-and-the-decision-process/

QUESTION 230

Which BGP aggregate address configuration advertises only the aggregate address, with attributes inherited from the more specific routes?

A. summary-only as-set

B. as-set

C. summary

D. summary-only

Correct Answer: A

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

Example:

router bgp 300

neighbor 2.2.2.2 remote-as 100

neighbor 3.3.3.3 remote-as 200

neighbor 4.4.4.4 remote-as 400

aggregate-address 160.0.0.0 255.0.0.0 summary-only as-set

!— With the as-set configuration command, the aggregate

!— inherits the attributes of the more-specific routes.

Reference. http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5441- aggregation.html

QUESTION 231

Refer to the exhibit.

If ISIS is configured utilizing default metrics, what is the cost for Router 4 to reach the 10.2.2.0/24 network?

A. 1

B. 20

C. 30

D. 63

Correct Answer: C

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

By default, every link is an IS-IS network has a metric of 10.QUESTION 232

Refer to the exhibit.

Which three statements about this configuration are true? (Choose three.)

A. The default route appears in the global routing table.

B. The static route appears in the VRF red routing table.

C. The subnet 192.168.1.0 is unique to the VRF red routing table.

D. The static route is added to the global routing table and leaked from the VRF red.

E. The subnet 192.168.1.0 is unique to the global routing table.

F. 192.168.1.1 is reachable using any of the addresses on the router where the static route is configured.

Correct Answer: ABE

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

This is an example of the route leaking feature. Here, this static route is created for the red VRF so it will be installed into the red VRF routing table, but the use of

the global keyword will cause this default route to appear in the global routing table.

QUESTION 233

Refer to the exhibit.

Which route type is displayed when you enter the command show ip route supernets-only on a device with this configuration?

A. Connected

B. OSPF

C. RIP

D. EIGRP

E. An empty route set

Correct Answer: E

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

This command shows supernets only; it does not show subnets. In this case, the routing table would contain the 10.0.0.0/24 subnet, but not the 10.0.0.0/8

supernet.

QUESTION 234

Which statement about passive interfaces is true?

A. The interface with the OSPF passive interface configuration appears as a not-so-stubby network.

B. The interface with the EIGRP passive interface configuration ignores routes after the exchange of hello packets.

C. The interface with the IS-IS passive interface configuration sends the IP address of that interface in the link-state protocol data units.

D. Passive interface can be configured on the interface for IS-IS.

Correct Answer: C

Section: Layer 3 TechnologiesExplanation

Explanation/Reference:

Explanation:

With IS-IS, passive interfaces are used to prevent unnecessary LSA packets out that interface, but the IP address of passive interfaces are still included in updates

going out the other interfaces. This behavior is what enables the best practice of configuring loopback interfaces as passive, but still having the loopback be

reachable.

QUESTION 235

Refer to the exhibit.

Which two routes are included in the route update? (Choose two.)

A. 10.3.0.0

B. 10.3.2.0

C. 10.3.4.0

D. 10.3.6.0

Correct Answer: CD

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

This access list will permit the 10.3.4.0, 10.3.5.0, 10.3.6.0, and 10.3.7.0 subnets.

QUESTION 236

Which two statements about the metric-style wide statement as it applies to route redistribution are true? (Choose two.)

A. It is used in IS-IS.

B. It is used in OSPF.

C. It is used in EIGRP.D. It is used for accepting TLV.

E. It is used in PIM for accepting mroutes.

F. It is used for accepting external routes.

Correct Answer: AD

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

To configure a router running IS-IS to generate and accept only new-style TLVs (TLV stands for type, length, and value object), use the metric-style wide

command.

Reference.

http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/TE_1208S.html#wp49409

QUESTION 237

You are tasked with configuring a router on an OSPF domain to import routes from an EIGRP domain and summarize the routes to 192.168.64.0.

Which statement configures the summarized route and provides equal-path route redundancy?

A. area 32 range 192.168.64.0 255.255.192.0 cost 100

B. area 32 range 192.168.64.0 255.255.63.0 cost 100

C. area 32 range 192.168.64.0 255.255.64.0 cost 100

D. area 32 range 192.168.64.0 255.255.192.0 multi-path

Correct Answer: A

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

area range

To consolidate and summarize routes at an area boundary, use the area range command in router configuration mode. To disable this function, use the no form

of this command.

Syntax Description

Reference.

http://www.cisco.com/c/en/us/td/docs/ios/12_2/iproute/command/reference/fiprrp_r/1rfospf.html#w p1017596

QUESTION 238

Packets from a router with policy-based routing configured are failing to reach the next hop.

Which two additions can you make to the router configuration to enable the packets to flow correctly? (Choose two.)

A. Enable ip proxy-arp on the exiting interface.

B. Specify the next hop as an address.

C. Specify the next hop as an interface.

D. Add a match-any permit statement to the route map.

Correct Answer: AB

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

Here is an example:

Router(config)#route-map Engineers permit 20

Router(config-route-map)#match ip address 2

Router(config-route-map)#set interface Ethernet1

Here, instead of specifying a next-hop, it specifies that any packets matching this rule will be forwarded directly out the interface Ethernet1. This means that eitherthe destination device must be on this segment, or there must be a router configured with Proxy ARP that can forward the packet to the ultimate destination.

QUESTION 239

Which two options are EIGRP route authentication encryption modes? (Choose two.)

A. MD5

B. HMAC-SHA-256bit

C. ESP-AES

D. HMAC-AES

Correct Answer: AB

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

Packets exchanged between neighbors must be authenticated to ensure that a device accepts packets only from devices that have the same preshared

authentication key. Enhanced Interior Gateway Routing Protocol (EIGRP) authentication is configurable on a per-interface basis; this means that packets

exchanged between neighbors connected through an interface are authenticated. EIGRP supports message digest algorithm 5 (MD5) authentication to prevent

the introduction of unauthorized information from unapproved sources. MD5 authentication is defined in RFC 1321. EIGRP also supports the Hashed Message

Authentication Code-Secure Hash Algorithm-256 (HMAC-SHA-256) authentication method.

Reference. http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/ire- xe-3s-book/ire-sha-256.html

QUESTION 240

Which neighbor-discovery message type is used to verify connectivity to a neighbor when the link- layer address of the neighbor is known?

A. neighbor solicitation

B. neighbor advertisement

C. router advertisement

D. router solicitation

Correct Answer: A

Section: Layer 3 Technologies

Explanation

Explanation/Reference:

Explanation:

IPv6 Neighbor Solicitation MessageA value of 135 in the Type field of the ICMP packet header identifies a neighbor solicitation message. Neighbor solicitation messages are sent on the local link

when a node wants to determine the link-layer address of another node on the same local link (see the figure below). When a node wants to determine the linklayer

address of another node, the source address in a neighbor solicitation message is the IPv6 address of the node sending the neighbor solicitation message.

The destination address in the neighbor solicitation message is the solicited-node multicast address that corresponds to the IPv6 address of the destination node.

The neighbor solicitation message also includes the link-layer address of the source node.

Figure 1. IPv6 Neighbor Discovery: Neighbor Solicitation Message

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