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QUESTION NO:1
Which two commands are required to enable multicast on a router, knowing that the receivers only
support IGMPv2? (Choose two.)
A. ip pim rp-address
B. ip pim ssm
C. ip pim sparse-mode
D. ip pim passive
Answer: A,C
Explanation:
Sparse mode logic (pull mode) is the opposite of Dense mode logic (push mode), in Dense mode
it is supposed that in every network there is someone who is requesting the multicast traffic so
PIM-DM routers begin by flooding the multicast traffic out of all their interfaces except those from
where a prune message is received to eliminate the
QUESTION NO:2
A branch router is configured with an egress QoS policy that was designed for a total number of
10 concurrent VOIP calls.
Due to expansion, 15 VOIP calls are now running over the link, but after the 14th call was
established, all calls were affected and the voice quality was dramatically degraded.
Assuming that there is enough bandwidth on the link for all of this traffic, which part of the QoS
configuration should be updated due to the new traffic profile?
A. Increase the shaping rate for the priority queue. B.
Remove the policer applied on the priority queue. C.
Remove the shaper applied on the priority queue. D.
Increase the policing rate for the priority queue.
Answer: D
Explanation:
QUESTION NO:12
Which two options are contained in a VTP subset advertisement? (Choose two.)
A. followers field
B. MD5 digest
C. VLAN information
D. sequence number
Answer: C,D
Explanation:
Subset Advertisements
When you add, delete, or change a VLAN in a Catalyst, the server Catalyst where the changes are
made increments the configuration revision and issues a summary advertisement. One or several
subset advertisements follow the summary advertisement. A subset advertisement contains a list
of VLAN information.
If there are several VLANs, more than one subset advertisement can be required in order to
advertise all the VLANs.
Subset Advertisement Packet Format
This formatted example shows that each VLAN information field contains information for a different
VLAN. It is ordered so that lowered-valued ISL VLAN IDs occur first:
Most of the fields in this packet are easy to understand. These are two clarifications:
Code
QUESTION NO:13
Which two statements are true about traffic shaping? (Choose two.)
A. Out-of-profile packets are queued.
B. It causes TCP retransmits.
C. Marking/remarking is not supported.
D. It does not respond to BECN and ForeSight Messages.
E. It uses a single/two-bucket mechanism for metering.
Answer: A,C
Explanation:
QUESTION NO:23
What action will a BGP route reflector take when it receives a prefix marked with the community
attribute NO ADVERTISE from a client peer?
A. It will advertise the prefix to all other client peers and non-client peers.
B. It will not advertise the prefix to EBGP peers.
C. It will only advertise the prefix to all other IBGP peers.
D. It will not advertise the prefix to any peers.
Answer: D
Explanation:
400-101 Practice Test400-101 Exam Questions400-101 Braindumps
QUESTION NO:24
Refer to the exhibit.
R1 is not learning about the 172.16.10.0 subnet from the BGP neighbor R2 (209.165.202.130).
What can be done so that R1 will learn about this network?
A. Disable auto-summary on R2.
B. Configure an explicit network command for the 172.16.10.0 subnet on R2.
C. Subnet information cannot be passed between IBGP peers.
D. Disable auto-summary on R1.
Answer: B
Explanation:
By default, BGP does not accept subnets redistributed from IGP. To advertise and carry subnet
routes in BGP, use an explicit network command or the no auto-summary command. If you disable
auto-summarization and have not entered a network command, you will not advertise network
routes for networks with subnet routes unless they contain a summary route.
Reference
http://www.cisco.com/en/US/docs/ios/11_3/np1/command/reference/1rbgp.html
QUESTION NO:29
What is the first thing that happens when IPv6 is enabled on an interface on a host?
A. A router solicitation is sent on that interface.
B. There is a duplicate address detection on the host interface.
C. The link local address is assigned on the host interface.
D. A neighbor redirect message is sent on the host interface.
Answer: B
Explanation:
Duplicate address detection (DAD) is used to verify that an IPv6 home address is unique on the
LAN before assigning the address to a physical interface (for example, QDIO). z/OS
Communications Server responds to other nodes doing DAD for IP addresses assigned to the
interface.
Reference
http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp?topic=/com.ibm.zos.r12.hale001
/ipv6d0021002145.htm
QUESTION NO:35
Which command will define a VRF with name ‘CCIE’ in IPv6?
A. ip vrf CCIE
B. ipv6 vrf CCIE
C. vrf definition CCIE
D. ipv6 vrf definition CCIE
Answer: C
Explanation:
QUESTION NO:39
Which two statements are correct about Nonstop Forwarding? (Choose two.)
A. It allows the standby RP to take control of the device after a hardware or software fault on the
active RP.
B. It is a Layer 3 function that works with SSO to minimize the amount of time a network is
unavailable to users following a switchover.
C. It is supported by the implementation of EIGRP, OSPF, RIPv2, and BGP protocols.
D. It synchronizes startup configuration, startup variables, and running configuration.
E. The main objective of NSF is to continue forwarding IP packets following a switchover.
F. Layer 2 802.1w or 802.1s must be used, as 802.1d cannot process the Layer 2 changes.
G. Routing protocol tuning parameters must be the same as the NSF parameters, or failover will
be inconsistent.
Answer: B,E
Explanation: Explanation
Cisco Nonstop Forwarding (NSF) works with the Stateful Switchover (SSO) feature in Cisco IOS
software. NSF works with SSO to minimize the amount of time a network is unavailable to its
users following a switchover. The main objective of Cisco NSF is to continue forwarding IP
packets following a Route Processor (RP) switchover.
Reference
http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fsnsf20s.html
QUESTION NO:42
Which type of domains is interconnected using Multicast Source Discovery Protocol?
A. PIM-SM
B. PIM-DM
C. PIM-SSM
D. DVMRP
Answer: A
Explanation: Multicast Source Discovery Protocol (MSDP) is a Protocol Independent Multicast
(PIM) family multicast routing protocol defined by Experimental RFC 3618. MSDP interconnects
multiple IPv4 PIM Sparse-Mode (PIM-SM) domains which enables PIM-SM to have Rendezvous
Point (RP) redundancy and inter-domain multicasting.
Reference
http://en.wikipedia.org/wiki/Multicast_Source_Discovery_Protocol
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