H12-891_V1.0-ENU Practice Test Questions Answers Updated 611 Questions [Q169-Q191]

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H12-891_V1.0-ENU Practice Test Questions Answers Updated 611 Questions

H12-891_V1.0-ENU dumps & HCIE-Datacom Sure Practice with 611 Questions

NEW QUESTION 169
What are the differences between traffic policing and traffic shaping?

Traffic shaping is applied in the inlet direction and traffic supervision is applied in the outlet direction

For traffic shaping, the router caches excess packets until bandwidth is available again

The token bucket algorithm is used for traffic supervision, and the SPD algorithm is used for traffic shaping

For traffic policing, the usage of the buffer can be adjusted for traffic exceeding the CIR

For traffic shaping, it can be over-CIR Traffic adjustment for the usage of the buffer

NEW QUESTION 170
Compared to IPV4 multicast, which of the following descriptions is the characteristic of IP6 multicast?

IPv6 multicast does not contain MSDP and dense mode

The first 8bit IPV6 multicast address is always FF(11111111).

IPv6 multicast clients use IGMPv3 to join multicast groups

IPv6 multicast load sharing extends the multicast routing rules and is completely independent of RPF check

NEW QUESTION 171
LDP messages are exchanged between LDLRs running the LDP protocol, and LDP messages can be divided into four types according to function, which of the following is not an LDP message type?

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Label Exchange Information

NEW QUESTION 172
What about the description of IGMP Snooping, is it correct?

IGMP Snooping solves the problem of multicast messages broadcasting in layer 3

IGMP Snooping does not consume the CPU of the switch

IGMP Snooping establishes a MAC multicast address table by listening for IGMP packets sent by the host

IGMP Snooping runs at the link layer and is a multicast constraint mechanism on Layer 2 Ethernet switches that manages and controls multicast groups

NEW QUESTION 173
What kind of scenario can use AS-path-filter? (Multiple select).

A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as the command peer X.x.x.x as path-filter import

The apply clause in Route policy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.x.x.x as path-filter export

The if-match clause in Route-policy

NEW QUESTION 174
In ospf broadcast networks, there are 4 routers RTA, RTB, RTC, and RTDs within the same network segment. The DR priorities are 2, 1, 1, and O, and the Router ID is respective 1921681.1, 19216821, 19216831, and 19216841 If the OSPF protocol is enabled on both of these four routers, ospf selects the BDR as

RTB

RTC

RTD

RTA

NEW QUESTION 175
As shown in the figure, an engineer uses four routers to test the interoperability of branch networks, where R1, R2, and R3 in branch 1 deploy OSPF Network interoperability is implemented, and R, R3, R4 in Branch 2 is deployed is-IS to achieve network interoperability. Now that the engineer wants to implement R1 access to R4’s loopback address, which of the following actions will meet this requirement?

No configuration is required

Publish default routes only in the OSPF process for R2

In the OSPF process of R2 and the IS-IS process, the default routes are published separately

Publish the default route only in the IS-IS process of R2

NEW QUESTION 176
If a DR needs to be elected between multicast routers running PIM-SM to be responsible for the sending and receiving of source or member multicast data, which one is described correctly below for the DR election rule?

PIM routers with long interface masks are elected dr.

Compare the DR priority first; With the same priority, you need to compare the interface IP addresses of the PIM routers to elect dr

PIM routers with small IP addresses are elected DR. PIM routers with low

DR priority values are elected DR.

NEW QUESTION 177
The following statement about the Security Alliance SA in IPSec is wrong with?

SA is uniquely identified by a triple that includes the Security Parameter Inder, Security Parameter Inder), the source IP address, and the Security Protocol Number (ASESP) used

Use the display ipsec command to view information such as the encryption method used with another IPSEC peer, the traffic of interest, and so on.

IPSec only supports encrypting data using the pair encryption algorithm.

IpSec peers must be at a two-way SA to establish an IPSec VPN connection to close

NEW QUESTION 178
/R1Jospf1lRL-osp- jarea.2[RLospf-1-arca-0002]network1001310000 As shown in the configuration, the administrator configured OSPF but RI on R1 You cannot learn routes for other routing rings. Then the possible cause is the question).

This router does not have an OSPF process number configured

This router is configured with a different zone ID than its neighbor router’s zone ID

This router does not have authentication features configured, but neighbor routers configure authentication features

The declared network address of this router does not match the interface mask

NEW QUESTION 179
In an intra-domain MPLSVPN network, when a packet enters the public network and is forwarded, it is encapsulated with two layers of MPLS tags, and the description of the two layers of tags in the following options is incorrect

The outer label of mpls VPN is assigned by the LDP protocol or statically, and the inner label is assigned by the MP-BGP neighbor of the peer

The outer label of MPLS VPN is called a private network label, and the inner label is called a public network label

The outer label is used to correctly send packets to the appropriate VPN in

on the PE device By default, the outer label is ejected before the packet is forwarded to the last hop device

NEW QUESTION 180
CORRECT TEXT
In EPIM-SM, the following description of the PIM Join message is correct?

PIM Join messages are sent every 3 minutes, and status

PIM Join messages for the multicast tree are only sent when the multicast tree is first established

The PIM Join message is sent every 60 seconds to refresh the status of the upstream router mroute for the multicast tree

The upstream router sends a PIM Join acknowledgment in response to each PIM Join message received from the downstream router

NEW QUESTION 181
The Path Selection tool can define multiple entries, which of the following tools will automatically generate a rejection of any entries at the end of the slot

Community -filter

IP-prefix

Route policy

AS-Path- filter

NEW QUESTION 182
CORRECT TEXT
As shown in the figure, the overload bit of ISIS is set in the configuration of router R3, and the following statement is correct

R3’s direct route will be ignored by R1 and R2 because of the setting of the overload bit.

When the router runs out of memory, the system automatically sets the overload flag bit in the sent LSP packets. Irrelevant to whether the user has a set-overload command configured.

R3 through import-route will not be published.

R3 will not be able to spread to R1 and R2

R3 initiates the load state, and R1 and RZ will not calculate the LSP of R3 cattle in the SP tree.

NEW QUESTION 183
Regarding the cross-domain VPN-OptionB scenario, what is the following description incorrect?

In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor relationship.

Cross-domain VPN An Option

scheme is not limited by the number of interconnection links between ASBRs

The outer layer label is exchanged between two ASBRs to VPNv4 routes.

NEW QUESTION 184
An engineer uses 2 routers to test Pv6 services and runs OSPFV3 to achieve interconnection and interoperability of IPV6 networks. The RI has access to the loopback address of R2. The engineer looks at ri’s OSPF3 routing table entry and finds that there is no route reaching the R2 loopback address It can’t be caused by which of the following?

R2 does not enable OSPFv3 on the loopback port

R2 does not advertise the loopback address

R2 in area 0 to advertise the loopback into a different OSPFv3 process

R2 does not configure the Router ID used in the OSPFv3 process

NEW QUESTION 185
In a multicast network running PIM-SM mode, how does the router choose the upstream interface?

looks up the outgoing interface corresponding to the RP address in the unicast routing table

Interfaces to which multicast group members are directly connected

Find the outbound interface corresponding to the mapping proxy in the unicast routing table

The interface that is fast to the PIlM Join message

Interface for sending PIM Heilo messages.

NEW QUESTION 186
An engineer used 2 routers to test IPv6 services and simulated the interconnection between headquarters and branches by running BGP4+. The network logic topology is shown in the figure, regarding the delivery of IPv6 routes between two devices, which of the following statements is wrong?

When a route is passed, it carries a recognized mandatory attribute such as AS_Path

BGP4+ passes routing information between peers via Update packet

When routing is passed, the Next_Hop attribute must be an IPv6 global unicast address

If the Update message carries the MP_REACH_NLRI attribute, it means that the advertisement is reachable route

NEW QUESTION 187
Configuring filter-policy 2000 export in the IS-IS process, the wrong statement about the function of the command is?

which needs to be used in conjunction with route ingestion, acts as an external route sender neighbor that only partially introduces.

If you do not configure this command, the device will by default introduce the external routing protocol to the IS-IS route all outgoing

Restricts the external publication of route entries generated by the device itself

This command will filter the link status information released to the outside world

NEW QUESTION 188
Regarding the OSPFv3 protocol, what is the error described below?

Under the sukugan of a shared router, each OSPFv3 process runs independently

Multiple instances can be run in the same OSPFv3 under the same interface

Can support running multiple instances on a single link

OSPFv3 message header will contain instance IDFu Duan flogging

NEW QUESTION 189
The correct description about the prefix list is:

The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths

The prefix list is used to filter IP prefixes, and cannot match both the prefix number and the prefix length

The prefix list cannot be used for packet filtering

The prefix list can be used to filter packets

NEW QUESTION 190
WRED is configured on the newly deployed router HW. The following description of the WRED feature is correct as? (Multiple select).

WRED can set different drop thresholds and packet loss rates for packets of different priority

When traffic exceeds the minimum threshold, WRED starts dropping all ingress traffic (tail drops).

Avoid global synchronization by selectively dropping multiple TCP streams Low- bandwidth traffic is easier to drop than high-bandwidth traffic

NEW QUESTION 191
RD is used to distinguish between the same IP address in different VPNs, and how many bits (radio) the RD contains

16 D,128