H12-224 Sample Questions Answers

in a P2MP network devices with different mask lengths cannot establish neighbor relationships but this limitation can be

In a P2MP network DR and BDR need to be elected

OSPF does not regard a network as a P2MP network type by default regardless of any

link layer protocol A P2MP network

ln a P2MP network sent LSAs can be filtered using the filter-ls a-out peer command

Down, Init, 2-way, Exchange, Exstart, Loading, Full

Down, Exstart, 2 way, Init, Exchange, Loading, Hull

Down, Init, Exstart, Exchange, Loading, Full

Down, Init, 2 way, Exstart, Exchange, Loading, Full

TRUE

FALSE

Discarding

Learning

Forwarding

Discarding Learning and Forwarding

The master in the VRRP group is selected based on priorities

The master sends gratuitous ARP packets and notifies the connected device or host of its virtual MAC address 'iSSi

if the master fails the new master is selected among backup devices based on priorities

The priority ranges from 1to 255 When the backup received VRRP Advertisement packets which the priority is 0 the backup discards the packets

Preemption in static LACP mode is enabled by default.

When a high-priority interface switches to the Inactive interface due to a fault and then Is restored, if preemption is enabled, the restored high-priority interface becomes the active interface after a delay. If preemption is disabled, the interface cannot become the active interface.

To prevent unstable transmission due to frequent link status changes, can set a preemption delay.

If the preemption delays at both ends are different, the larger preemption delay is used.

in idle state, bgp denies all connection requests, this is the initial state of bgp.

In active state bgp attempts to establish a tcp connection, this is the intermediate state

of bgp.

in established state, bgp peers can exchange update, route-refresh, keepalive, and

notification message.

A BGP peer relationship can be established only when both

BGP peers are in open confirm state, two bgp peers send update messages to exchange

routes.

A BFD, session can be set up. After the negotiation, the detection interval of 90ms is used.

A BFD, session can be set up. After the negotiation, the detection interval of 30ms is used.

A BFD, session can be set up. And packets are sent at respective interval at both ends.

A BFD, session cannot be established.

After a router receives a Network-Summary-LSA, this router runs a SPF algorithm.

Network-LSA describes link state information of broadcast and NBMA segment.

A virtual connection is a virtual link that belongs to the backbone area (Area 0).

Type 4 LSA describes how to reach an A5BR, including routing and topology information.

TRUE

FALSE

this route must exist in the IP routing table and be the optimal route.

this route must match the specified prefix and does not need to accurately match the mask length.

this route must accurately match the specified mask length.

this route must be on IGP route.

Time plan

Personnel arrangement

Migration process

Risk control measures

TRUE

FALSE

MPLS supports various network layer protocols and the packets carrying MPLS labels must be encapsulated into PPP frames be fames before being transmitted

MPLS labels uniquely identify specific packets in different subnets

The router can aggregate multiple IP flows into an FEC according to the forwarding target

Network connections must be established before the packets carrying MPLS labels can be transmitted E.MPLS replaces IP forwarding with label switching

The two routes will be both advertised to other BGP peers

One optimal route is selected from the two routes and then advertised to other BGP peers

The two routes will not be advertised to other BGP peers

One optimal route is selected from the two routes and then advertised to IBGP peers

5s

10s

3.3 s

40s

TRUE

FALSE

Packet length

Source and destination addresses

Protocol type

Source and destination MAC addresses

Defense against bogus DHCP server attacks

Defense against Dos attacks on the DHCP server

Defense against MAC address flooding attacks

Source MAC address check for data packets in collaboration with DAL

Source IP address check for data packets in collaboration with IPSG

Customers access the enterprise network public resources or Internet during exchanges with or visits to the enterprise

Citizens access the Internet through the network provided by public utilities

Consumers connect to the Internet over the enterprise network

Enterprise employees on a business trip connect to the enterprise network through branch network

TRUE

FALSE

Point-to-Point describes about the Point-to-point connection from the local router to a neighboring

TransNet describes a connection form the local router to a transit network segment

SubNet describes a connection form the local router to a stub network segment

P2MP describes connections from the local router to multiple neighboring routers

1-byte port priority and 1-byte port number

1-byte port priority and 2-byte port number

2-byte port priority and 1-byte port number

2-byte port priority and 2-byle port number

TRUE

FALSE

IP address assignment

Network device model

Data flow direction of each service system

Equipment room environment

BGP does not accept the mutes whose AS_Path attribute contains the local AS number

Next hop is a well-known mandatory attribute of BGP mutes

The AS. Path attribute records all the ASs that a BGP route passes through on the transmission path In route selection rules a route with a shorter AS

The AS_Path attribute records all the ASs that a BGP route passes through on the transmission path In route selection rules a route with a shorter AS_checked in IBGP

TRUE

FALSE

TRUE

FALSE

GIobal TCP synchronization

High jitter and long delay

High cost

Packets are discarded without differentiating the priority

An ABR is connected to multiple areas and maintains the same LSDB for all areas.

The metric of an AS-external-LSA can be specified during the import of external mutes

and defaults to 1.

External muting information can carry a tag, the tag information is contained in a Type 5

or Type 7 LSA.

The Link State ID. in an ASBR-Summary-LSA is ser as the muter ID. of this ASBR.

AII BGP routers must identify these attributes

These attributes must be transmitted between BGP peers

These attributes do not necessary to be carried in Update messages, and BGP routers

can determine whether to carry them in Update messages

These attributes do not necessary to be transmitted between BGP peers

Fault identification

Information collection

Cause list

Troubleshooting assessment Mi

Label distribution router

Label edge router(LER)

Label switching router(LSR)

Label transmission router

Port isolation controls access between interfaces of switches

Port isolation prevents the computers connects to differ faces from accessing each other

Port isolation can be configured based on VLANs

Port isolation is an isolation mechanism at the physical layer

Stability

Bandwidth

Delay

fitter

Security

vrrp vrid 1preempt-timer20

Vrrp vrid 1 preempt-timer delay 20C. vrrp vrid 1timer delay 20

vrrp vrid 1 preempt-delay20

Two BGP-running routers must have IP connectivity if they need to establish a TCP connection

If two BGP peers exchanging BGP messages belong to the same AS the two peers are IBGP peers

If two BGP peers exchanging BGP messages belong to different AS, the two peers are EBGP peers

IBGP peers must be physically directly connected

Management authorization

Technology authorization

Customer authorization

Administrative authorization

Neighbor relationship establishment

Route calculation

Link information exchange

Router advertisement

Compared with traffic policing traffic shaping has good anti-burst capability

Traffic shaping enables packets to be transmitted at an even rate

Because queues are used the delay is added when congestion occurs.

Compared with traffic policing traffic shaping is more suitable for voice service

True

FALSE

vrrp vrid 1track bfd-session session-name 1reduced 100

bfd-session vrrp vrid 1 track session-name 1 reduced 100

track vrrp vrid 1bfd-session session-name 1 reduced 100

vrrp vrid 1 track bfd- session-name 1 reduced 100

Accuracy

Good portability

Verification

Rollback

If a virtual link exists in a network design problems often exist and need to be optimized.

The existence of virtual link increases network complexity

Virtual link may lead to loops

The interval for sending Hello packets on a virtual link is 10s

OSPF routers must establish an adjacency before exchanging information.

Not all neighbors can establish adjacencies.

Adjacencies are maintained using OSPF Hello Protocol

Neighbor relationships are selected from adjacencies to exchange routing information

The SSH protocol is not bound in the VTY user interface view.

The user service type authentication type and user service type are not configured.

The SSH server and client have inconsistent versions.

The SSH first-time authentication function is disabled.

TRURE

FALSE

TRUE

FALSE

An internal router is a router of which all the interfaces belong to the same area.

An Area Border Router (ABR) is a router connected to one or more areas , one of which

is the backbone area. ABR

A backbone router is a router with at least two interfaces belonging to the backbone

area.

An Autonomous System Boundary Router ( ASBR ) can be an internal router , a backbone router , or an ABR

The default security level of the new zone is 1.

Only the security level of the user-defined zone can be configured.

The configured security level cannot be changed.

Two zones cannot be configured with the same security level.

TRUE

FALSE

An inactive default mute will be generated in the local BGP muting table, but this mute will not be delivered to the IP muting table

An active default mute will be generated in the local BGP muting table and delivered to the IP muting table.

No default mute will be generated in the local BGP muting table

A default mute will be generated in the local BGP muting table. Whether the default muting will be delivered to the IP muting table default

TRUE

FALSE

TRUE

FALSE

Source DR

Receiver s router

Last-hop router

RP router