[Free] Download New Updated (August 2016) Cisco 400-101 Real Exam 581-590

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QUESTION 581

Refer to the exhibit. If OSPF is implemented on the network, which additional configuration is needed to allow traffic from host 10.4.1.15/24 to host 10.1.2.20/24?

 

clip_image002

 

A.

A virtual link between router 2 and router 4

B.

A virtual link between router 3 and router 4

C.

A virtual link between router 2 and router 3

D.

The current design allows traffic between the two hosts.

 

Correct Answer: D

Explanation:

This specific traffic from 10.4.1.0/24 to 10.1.2.0/24 would work because this traffic crosses only over the single OSPF area of 0.0.0.1.

However, traffic from hosts on R4 to R1 would indeed need a virtual link, since area 0.0.0.2 is not connected to the backbone area of 0.0.0.0.

 

 

QUESTION 582

Which option is a correct match criterion for policy-based routing?

 

A.

length

B.

interface type

C.

interface

D.

cost

 

Correct Answer: A

 

 

QUESTION 583

Which statement describes the effect of the configuration line redistribute maximum-prefix 1500 90 withdraw?

 

A.

After the 1500th route is redistributed, a warning is posted in the log file and 90 more routes are redistributed before further routes are discarded.

B.

After the 1350th route is redistributed, a warning is posted in the log file until the 1500th route is redistributed, and then further routes are discarded.

C.

After the 1500th route is redistributed, further routes are discarded only if the CPU is above 90%.

D.

The routing protocol receives 1500 routes. After the routing process has redistributed 90% of the routes, the process supernets routes and injects a NULL route to prevent black-hole routing.

 

Correct Answer: B

 

 

QUESTION 584

Which three statements about RIP timers are true? (Choose three.)

 

A.

The default update timer is 30 seconds.

B.

The default invalid timer is 180 seconds.

C.

The default holddown timer is 180 seconds.

D.

The default flush timer is 60 seconds.

E.

The default scan timer is 60 seconds.

F.

The default hello timer is 5 seconds.

 

Correct Answer: ABC

Explanation:

The routing information protocol uses the following timers as part of its operation:

Update Timer

Invalid Timer

Flush Timer

Holddown Timer

 

Update Timer

The update timer controls the interval between two gratuitous Response Message. By default the value is 30 seconds. The response message is broadcast to all its RIP enabled interface.

Invalid Timer

The invalid timer specifies how long a routing entry can be in the routing table without being updated. This is also called as expiration Timer. By default, the value is 180 seconds. After the timer expires the hop count of the routing entry will be set to 16, marking the destination as unreachable.

Flush Timer

The flush timer controls the time between the route is invalidated or marked as unreachable and removal of entry from the routing table. By default the value is 240 seconds. This is 60 seconds longer than Invalid timer. So for 60 seconds the router will be advertising about this unreachable route to all its neighbors. This timer must be set to a higher value than the invalid timer.

Hold-down Timer

The hold-down timer is started per route entry, when the hop count is changing from lower value to higher value. This allows the route to get stabilized. During this time no update can be done to that routing entry. This is not part of the RFC 1058. This is Cisco’s implementation. The default value of this timer is 180 seconds.

Reference: http://en.wikipedia.org/wiki/Routing_Information_Protocol#Timers

 

 

QUESTION 585

Which two protocols are used to establish IPv6 connectivity over an MPLS network? (Choose two.)

 

A.

6PE

B.

6VPE

C.

RSVP

D.

ISATAP

E.

LDP

F.

IPv6IP

 

Correct Answer: AB

 

 

QUESTION 586

Which three fields are part of a TCN BPDU? (Choose three.)

 

A.

protocol ID

B.

version

C.

type

D.

max-age

E.

flags

F.

message age

 

Correct Answer: ABC

 

 

QUESTION 587

Which two statements about the protected ports feature and the private VLAN feature are true? (Choose two.)

 

A.

The protected ports feature is limited to the local switch.

B.

The protected ports feature can isolate traffic between two “protected” ports on different switches.

C.

The private VLAN feature is limited to the local switch.

D.

The private VLAN feature prevents interhost communication within a VLAN across one or more switches.

 

Correct Answer: AD

Explanation:

Protected Ports (PVLAN Edge)

In some network environments, there is a requirement for no traffic to be seen or forwarded between host(s) on the same LAN segment, thereby preventing interhost communications. The PVLAN edge feature provisions this isolation by creating a firewall-like barrier, thereby blocking any unicast, broadcast, or multicast traffic among the protected ports on the switch. Note that the significance of the protected port feature is limited to the local switch, and there is no provision in the PVLAN edge feature to isolate traffic between two “protected” ports located on different switches. For this purpose, the PVLAN feature can be used.

Reference: http://www.ciscopress.com/articles/article.asp?p=1181682&seqNum=2

 

 

QUESTION 588

DRAG DROP

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

 

clip_image003

 

Correct Answer:

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QUESTION 589

Where must the spanning-tree timers be configured if they are not using the default timers?

 

A.

They must be on the root bridge.

B.

They must be on any non-root bridge.

C.

Changing the default timers is not allowed.

D.

Timers must be modified manually on each switch.

 

Correct Answer: A

 

 

QUESTION 590

Which two statements about the BGP community attribute are true? (Choose two.)

 

A.

Routers send the community attribute to all BGP neighbors automatically.

B.

A router can change a received community attribute before advertising it to peers.

C.

It is a well-known, discretionary BGP attribute.

D.

It is an optional transitive BGP attribute.

E.

A prefix can support only one community attribute.

 

Correct Answer: BD

Explanation:

A community is a group of prefixes that share some common property and can be configured with the BGP community attribute. The BGP Community attribute is an optional transitive attribute of variable length. The attribute consists of a set of four octet values that specify a community. The community attribute values are encoded with an Autonomous System (AS) number in the first two octets, with the remaining two octets defined by the AS. A prefix can have more than one community attribute. A BGP speaker that sees multiple community attributes in a prefix can act based on one, some or all the attributes. A router has the option to add or modify a community attribute before the router passes the attribute on to other peers.

Reference:

http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/28784-bgpcommunity.html

 

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