H12-224 HCNP-Routing&Switching (Fast Track) (Huawei Certified Network Professional -Routing&Switching) Questions and Answers

P spoofing attack

Smurf attack

ARP spoofing attack

ICMP attack

FIFO

RED

WRED

WFQ

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

TRUE

FALSE

Configure the user access port as an edge to prevent the user from connecting to the switch on this port.

Configure root protection on the user access port to ensure that the user does not connect to a switch with a higher priority

Configure loop protection on positions where loops have occurred so that loops are always blocked

Configure BPDU protection so that the switch checks the validity of each received

BPDU to prevent attacks of forged

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

If any host on a LAN is running IGMPv1 all hosts on the LAN must also use IGMPv1.

Membership Report message sent from the IGMPv1 host will be received by the IGMPv2 muter.

If the IGMPv1 is in a specific group theIGMPv2 muter must ignore all Leave messages received from this group.

The version 2 muter must set a countdown timer associated with the group that takes into account the presence of the version 1host.

The MUX VLAN contains a principal VLAN and subordinate VLANs. The principal

VLAN and subordinate VLANS cannot communication

The MUX VLAN contains a principal VLAN and subordinate VLANs. The subordinate

VLANs are classified into subordinate group VLAN can communicate with each other.

The interfaces between subordinate separate VLANs can communicate with each other,

but cannot communicate with the interface

The principal VLAN and subordinate VLANs cannot communicate

TRUE

FALSE

Attackers initiate MAC address spoofing attacks using the MAC address learning mechanism

Attackers send data frames with forged MAC address to the switch to initiate MAC address spoofing attacks

When MAC address spoofing attacks occur the switch may learn incorrect mapping between MAC address and IP addresses

When MAC address spoofing attacks occur the switch may sent packets to the attacker

All switches run in the same region by default

The STP calculation speed is faster than that when multiple instances are configured

Due to lack of configuration all switches switch the running mode to RSTP.

Each switch runs in an independent region

Neighbor relationship establishment

Route calculation

Link information exchange

Router advertisement

On a PIM-SM network multicast routers that have just started need to send Hello messages to discover neighbors and maintain neighbor relationships

Multicast routers periodically send Hello Messages to each other to maintain communication

A DR is selected on a network segment based on Hello messages exchanged between routers

Hello messages are sent to multicast group address

8

3

1

Account soft-out reminder

Password updated reminder

Log protection reminder

Data backup reminder

For device software maintenance onsite operations are allowed but only remote operations are recommended

The device software running is closely related to services running on the device

The external environment where hardware runs does not need special attention

For device environment maintenance personnel need to go the site or even use some professional tools for

TRURE

FALSE

The VRRP master periodically sends VRRP packets.

The VRRP master uses the virtual MAC address to respond to ARP Request packets destined for the virtual IP address.

The VRRP master forwards IP packets destined for the virtual MAC address.

Even if the router becomes the master, the backup router with a higher priority preempts to be the master.

TRUE

FALSE

1000-3999

2000-2999

3000-3999 0-1000

IP address that is statically bound with the MAC address of a client in database of the

DHCP sever

IP address that has been allocated to the client that is the IP address in the Requested

IP Adder Option of the DHCP Discover packet sent by the client

First available IP address found by the server in the DHCP address pool

On the DHCP server query Expired and conflicting IP addresses if you find an available

IP address you can assign EiP address that once conflicts with the IP address of another client.

The devices on two ends of a link have the same system ID

The devices on two ends of a link have inconsistent IS-IS levels

When an IS-IS level-1neighbor relationship is established the devices on two ends of a link have inconsistent area addresses

The IP addresses of interfaces on two ends of a link are on different network segments

Link State ID. indicates the router ID. of an ASBR

Advertising Router indicates the router ID. of an ABR

The Advertising Router fields in ASBR-Summary-LSAs of all areas are the same

Metric indicates the cost of routes form an ABR to an ASBR

Users cannot log in to the device remotely

The display interface coming output shows a large number of broadcast packets received on an interface

The CPU usage exceeds 70%

A lot of ICMP packets are lost in ping tests

TRUE

FALSE

DHCP Offer

DHCP Request

DHCP Discover

DHCPACK

TRUE

FALSE

Packet length

Source and destination addresses

Protocol type

Source and destination MAC addresses

5s

100ms

1000ms

10S

The hop count must be greater than

The hop count must be greater than2

The hop count must be greater than 15

The hop count must be greater than 255

The route with the higher local preference is preferred

A summarized route is preferred over a non-summarized route

The priorities of three origin attributes types are in the following order EGP IGP

Incomplete

Among the equal-cost routes the route with the shorter duster-list is preferred

RSVP is used to transmit signaling of Qos requests notifying the router of Qos requirements of the application

Lt provides guaranteed bandwidth and delay to meet requirements of the application

Lt can provide a load control service to ensure that even in the case of network overload can provide services similar to the net model ensures that packets of some applications can be processed with the low delay

ln this model the network maintains the status of each flow(IP addresses and port numbers of source and destination and destination ends )meeting application requirements

Packet filtering firewall

Proxy firewall

Stateful inspection firewall

Software firewall

TRUE

FALSE

LDP label distribution can be controlled in ordered mode

ln ordered mode when an LSR is the origin of a route it can send label mapping messages to the upstream router in

LDP label distribution cannot be controlled in independent mode

ln independent mode an LSR cannot send label mapping messages to the upstream router before it receives label m

A router maintains a timer for each group membership and periodically resets the timer

if it receives Report message

A router periodically sends Query messages and receiver hosts send Report messages after receiving the Query me

CA router periodically sends Group-Specific Query messages periodically

A router will not delete any group memberships unless it receives Leave messages

AS-external-LSAs can be advertised within a stub area

AS external route can only be based on a default route that is manually configured on an

ABR.

A virtual link cannot pass through a stub area

Any area can be a stub area

Principal VLAN

Subordinate VLAN

Guest VLAN Subordinate group VLAN

Red

Wired

TALL DROP

WFQ

the buffer overflow attack indicates that an attacker uses defects of memory operations of the software system and runs attack codes with high operation rights.

the buffer overflow attack is irrelevant to the OS vulnerabilities and architecture.

the buffer overflow attack is the most common attack of the software system.

the buffer overflow attack is an application-layer attack.

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

TRUE

FALSE

to test whether applications are properly connected.

to test whether a routing can prevent loops.

to test whether a switch can prevent loops and broadcast.

to test whether a physical link is disconnected.

BGP routes do not need to be periodically updated.

BGP sends complete routing table information during each router update.

BGP periodically sends Open messages to detect TCP connectivity.

BGP updates routes in multicast mode.

TRUE

FALSE

The unit of this field Is seconds. In a LSDB, the LS age of a LSA decreases with time.

The unit of this field is seconds. In a L5DB, the LS age of LSA increase with time.

If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.

If the LS age of a LSA has reached the LSRefershTime (30 minutes), any routers can regenerate an instance of this LSA again.

200

150

100

0

Enable DHCP globally

Configure the DHCP option 82 field

Configure the globally address pool if the DHCP server based on the global address pool is used.

Configure the interface address pool if the DHCP server based on the interface address pool is used.

You do not need to configure the principal VLAN and subordinate VLAN in sequence

The MUX VLAN function must be enabled on an interface so that it can take effect

The principal VLAN and the subordinate VLAN of the MUX VLAN can be the same

VLAN

The MUX VLAN can contain only one subordinate group VLAN

bfd enable

bfd all-interface enable

All-interface bfd enable

Am

Undo bfd all-interface disable

Project initiation

Bid release

Contract signing. Preliminary project acceptance

Faults cannot occur frequently

Faults can be recovered rapidly

No fault occurs

When faults occur, services can be only restored manually

bfd enable

Bfd all-interface enable

all-interface bfd enable

Undo bfd all-interface disable

eSight displays the layout and status of NEs subnets and links on the GUI

eSinght supports visualized monitoring of the network-wide running status

eSight display the architecture of the entire network and relationship between network entities

The physical topology monitoring provides an entry for unified network monitoring improving O&M efficiency

To ensure that sensitive management information will not be intercepted

To prevent or reduce external network attacks and harm

To ensure secure access to key services

To achieve secure user access control