[Free] 2017(July) Ensurepass Braindumps Cisco 400-101 Latest Dumps 431-440

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CCIE Routing and Switching Written Exam v5.1

QUESTION 431

Which two statements about the default behavior of IS-IS are true? (Choose two.)

 

A.

The default IS-IS router type is L1/L2.

B.

The default IS-IS metric type is wide.

C.

The default IS-IS interface circuit type is L1/L2.

D.

By default, two IS-IS routers must use the same hello interval and hold timer in order to become neighbors.

 

Correct Answer: AC

 

 

QUESTION 432

Refer to the exhibit. Which statement is true?

 

clip_image002

 

A.

The output shows an IPv6 multicast address with link-local scope.

B.

The output shows an IPv6 multicast address that is used for unique local sources only.

C.

The output shows an IPv6 multicast address that can be used for BIDIR-PIM only.

D.

The output shows an IPv6 multicast address with embedded RP.

 

Correct Answer: D

 

 

QUESTION 433

In a network where a Layer 2 switch interconnects several routers, which feature restricts multicast packets for each IP multicast group to only those mulicast router ports that have downstream receivers joined to that group?

 

A.

PIM snooping

B.

IGMP snooping

C.

IGMP filter

D.

IGMP proxy

 

Correct Answer: A

Explanation:

In networks where a Layer 2 switch interconnects several routers, such as an Internet exchange point (IXP), the switch floods IP multicast packets on all multicast router ports by default, even if there are no multicast receivers downstream. With PIM snooping enabled, the switch restr
icts multicast packets for each IP multicast group to only those multicast router ports that have downstream receivers joined to that group. When you enable PIM snooping, the switch learns which multicast router ports need to receive the multicast traffic within a specific VLAN by listening to the PIM hello messages, PIM join and prune messages, and bidirectional PIM designated forwarder-election messages

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snooppim.html

 

 

 

 

 

 

 

QUESTION 434

DRAG DROP

Drag and drop the IPv6 prefix on the left to the correct address type on the right. Not all options will be used.

 

clip_image004

 

Correct Answer:

clip_image006

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 435

Refer to the exhibit. Which two configuration changes enable you to log in to the router? (Choose two.)

 

clip_image007

 

A.

Configure a user name and password on the device.

B.

Modify the default login authentication group to use the terminal line password.

C.

Remove the terminal line password on the console line.

D.

Modify the terminal lines to include transport input none.

E.

Configure the terminal lines to use the local user database.

 

Correct Answer: AB

 

 

QUESTION 436

Which statement about NAT64 is true?

 

A.

It uses one-to-one mapping between IPv6 addresses and IPv4 addresses.

B.

It requires static address mapping between IPv6 addresses and IPv4 addresses.

C.

It can be used to translate an IPv6 network to another IPv6 network.

D.

It can be configured for stateless and stateful translation.

 

Correct Answer: D

 

 

 

 

 

 

QUESTION 437

DRAG DROP

Drag and drop the extended ping command field on the left to its usage on the right.

 

clip_image009

 

Correct Answer:

clip_image011

 

 

QUESTION 438

DRAG DROP

Drag and drop the EIGRP query condition on the left to the corresponding action taken by the router on the right.

 

clip_image013

 

Correct Answer:

clip_image015

 

 

QUESTION 439

Which three protocols support SSM? (Choose three.)

 

A.

IGMPv2

< font face="Arial">B.

IGMPv3

C.

IGMP v3lite

D.

URD

E.

CGMP

F.

IGMPv1

 

Correct Answer: BCD

 

 

QUESTION 440

In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.)

 

A.

tunnel mode

B.

transport mode

C.

6to4 mode

D.

4to6 mode

E.

ISATAP mode

 

Correct Answer: CE

Explanation:

*There are 5 tunneling solution in IPv6:*

*1. Using the “Tunnel mode ipv6ip”, in this case the tunnel source anddestination are configured with IPv4 addressing and the tunnel interface isconfigured with IPv6. This will use protocol 41.

This is used for IPv6/IPv4.*

 

R1(config)#int tunnel 1

R1(config-if)#ipv6 address 12:1:12::1/64

R1(config-if)#tunnel source 10.1.12.1

R1(config-if)#tunnel destination 10.1.12.2

R1(config-if)#*tunnel mode ipv6ip*

 

*2. Using the “Tunnel mode gre ipv6, in this case the tunnel source anddestination are all configured with IPv6 addressing. This is used forIPv6/IPv6. *

 

BB1(config)#int tunnel 1

BB1(config-if)#ipv6 address 121:1:121::111/64

BB1(config-if)#tunnel source 10:1:111::111

BB1(config-if)#tunnel destination 10:1:112::112

BB1(config-if)#*tunnel mode gre ipv6*

 

*3. In this case, the third type, the tunnel mode is NOT used at all, notethat the tunnel interface is configured with IPv6 and the tunnel source anddestination is configured with IPv4 but no mention of tunnel mode. Thisconfiguration will use protocol 47. This is used for IPv6/IPv4. *

 

R1(config)#int tunnel 13

R1(config-if)#ipv6 address 13:1:13::1/64

R1(config-if)#tunnel source 10.1.13.1

R1(config-if)#tunnel destination 10.1.13.3

 

*4. Note in this case a special addressing is assigned to the tunnelinterface which is a concatenation of a reserved IPv6 address of2002followed by the translatedIPv4 address of a given interface on the ro
uter. In this configuration ONLYthe tunnel source address is used and since the tunnel is automatic,the destinationaddress is NOT configured. The tunnel mode is set to “Tunnel mode ipv6ip6to4. Note the IPv4 address of 10.1.1.1 is translated to 0A.01.01.01 andonce concatenated, it will be “2002:0A01:0101: or 2002:A01:101. This is usedfor IPv6/IPv4.*

 

R1(config)#interface Tunnel14

R1(config-if)#ipv6 address 2002:A01:101::/128

R1(config-if)#tunnel source 10.1.1.1

R1(config-if)#*tunnel mode ipv6ip 6to4*

 

*5. ISATAP, ISATAP works like 6to4 tunnels, with one major difference, ituses a special IPv6 address which is formed as follows: *

*In this tunnel mode, the network portion can be any IPv6 address, whereasin 6to4 it had to start with 2002.*

*Note when the IPv6 address is assigned to the tunnel interface, the”eui-64 is used, in this case the host portion of the IPv6 address startswith “0000.5EFE” and then the rest of the host portion is the translatedIPv4 address of the tunnel’s source IPv4 address. This translation isperformed automatically unlike 6to4. This is used for IPv6/IPv4.*

 

R4(config)#int tunnel 46

R4(config-if)#ipv6 address 46:1:46::/64 eui-64

R4(config-if)#tunnel source 10.44.44.44

R4(config-if)#*tunnel mode ipv6ip ISATAP*

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