After port isolation is configured on a switch, hosts in the same VLAN cannot communicate with each other at Layer 2 or Layer 3 by default.
BGP/MPLS IP VPNs can only use LDP to construct public network tunnels.
BFDLink state detection at the heart (millisecond) level can be achieved.
Regarding the description of the encapsulation format of labels in MPLS, the correct one is
In an operator's MPLSVPN network, there are two devices PE1 and PE2 for MPLSVPN data forwarding. PE1 receives a private network route of 172.16.1.0/24 from the client, and converts it to a VPNv4 route on PE1 and assigns a label of 1027 Released to PE2. The outgoing label of the MPLS LSR-ID of PE2 reaching PE1 is 1025o When a client on PE2 accesses 172.16.1.0/24, the frame sent by PE2, the inner and outer labels should be a combination of the following 6 options?
If display current-configuration can reach the setting of !JIS-IS, and display saved-
There is no IS-IS setting in the configuration, so that means?
What is the value of the linkage between OSPF and BFD?
According to this picture, we can judge?
Type:Router
Lsid: 10.0.12 J
Adv rtr: 10.0.12.1
Ls age: 312
Len: 36
Options : A, BR E
\seq#:80000013
1chksum : 0xc61c
ILink count: 1
1* Link ID: 10.0.12.2
IData : 10.0.12.1
,Link Type: TransNet
.Metric : 1
An administrator runs the display mpls Isp command to view LSPs on a device. The command output is shown in the figure. Which of the following statements are true?
A campus deploys OSPF to implement network interworking. The LSDB of R2 is shown in the figure. From this LSDB. it is possible to
What information was obtained?
The link status information between different S.4S processes of the routers around the Taiwan and Taiwan is considered to be sound insulation.
As shown in the figure, on the R1 router, the network administrator can control the path of the traffic entering AS100 after modifying the value of the routing entry sent to R2 through the routing policy.
Which statement about DHCP Snooping is wrong?
What is the meaning of ipv6 enable topology ipv6 in IS-IS protocol view?
Which of the following is the least likely cause of a VRRP backup group dual-active failure?
On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements is false?
As shown in the figure, OSPF is enabled on all interfaces of the router, in which R4 and R5 can establish OSPF virtual connections.
Which of the following is not part of the preparatory work for the cutover plan?
Configure ipv6 preference in IS-IS protocol view. The function of this command is to configure the priority of IPv6 routes generated by IS-Is protocol.
According to this picture, Xinmen can be judged?
Which of the following features affects BGP neighbor establishment?
The input information of a router is as follows. Which of the following causes the OSPF adjacency cannot be established normally?
(Drag and drop question) The configuration shown in the figure is performed on R2 to filter all incoming routes. Suppose there is an entry on R1
AS_Path attribute is [100 200 300 400] BGP routes need to be sent to R2, please help network administrators in
Adjust the AS order in the AS_Path attribute of the route on R1 to ensure that the route entry will not be routed by R2
route^policy AS-PATH permit node 10 if-match as-path-filter BGP route-policy AS-PATH deny node 20 ip as-path-filter BGP permit A[A2]00 400 100_
route-policy AS-PATH permit node 10 if-match ip-prefix BGP
apply as-pathoverwrite
ip ip-prefix BGP permit 10.0.0.0 24
Please match the command with the function implemented.
If technology migration on the network affects the services running on the live network, strictly follow the preset operation process and risk control measures during the implementation of the technology migration project. Generally, this type of project is defined as a migration project. Which of the following operations performed on the live network belongs to a non-migration project?
The RR rules for advertising routes violate the IBGP split horizon rules, which may cause loops in the AS. Which routing attributes does RR use to prevent loops?
When B, CPIMPLS TP VPN is deployeD. the OSPF VPN Route Tag (VPN Route Tag) is not transmitted in the extended community attribute of MP-BGP, but the local concept is only meaningful on PE routers that receive MP-BGP routes and generate OSPF LSAs.
Which of the following statements about MPLS header TTL is correct?
IGP converges faster than BGP, which may cause network traffic loss. By enabling the OSPF and BGP linkage feature of the device, the device can keep the OSPF and BGP linkage during the set linkage time.____The router makes the link metric value in the LSA advertised to be the maximum value, so as to inform other OSPF devices not to use this router to forward data, so as to avoid traffic loss. (Note: If English letters are involved, all uppercase)
What fields are added in Update in order to advertise IPv6 routes in BGP4+.
R1 executes the operation ping -a lO.l.Ll 10.5.16.2, what is the meaning of this command?
According to this picture, the door can be judged?
Which of the following information can the DHCP binding table contain?
Ethernet is a network that supports broadcasting, and once there is a loop in the network, this simple broadcasting mechanism can cause catastrophic consequences. Which of the following phenomena may be caused by loops
When troubleshooting a network, if you need to confirm the business traffic path, which of the following may need to be done ()
What characteristics must a high-risk operation plan have?
As its network scale expands, an enterprise plans to move scattered servers to the same equipment room for unified management. During hardware migration, network engineers do not need to perform device commissioning and therefore do not need to work out a migration solution.
When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?
The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when these three routing entries are
After the entries arrive at the BP router in order, by default, BGP will finally call a route
entry?
When troubleshooting the EBGP neighbor relationship, you find that the two directly connected devices use the loopback interface to establish a connection, so execute display current-configuration configuration bgp to check the unitary setting of peer ebgp-max-hop hop-count, which of the following statements is correct?
On the OSPFv3 network shown in the figure, area 1 is a stub area. Which of the following statements are true?
In an MPLS network, functions such as neighbor discovery, session establishment and maintenance, and label management are implemented by exchanging LDP messages between SRs running the DP protocol. To ensure the reliability of message delivery, all LDP messages are sent and received based on TCP connections.
EGP authentication can prevent illegal routers from establishing neighbors with B, CP routers. B, CP authentication can be divided into MD5
Authentication and Keychain authentication, which of the following BGP documents will carry the B, CGP Keychain authentication letter
interest? (header carry)
BGP authentication can prevent illegal routers from establishing neighbors with BGP routers. BGP authentication can be divided into ID5 authentication and Keychain authentication. Which of the followingBGP packets will carryBGPKeychain authentication information?
The security protection actions that a secure MA, C address can perform does not include which of the following?
If the sticky MA, C function is enabled on an interface, by default, the number of MA, C addresses learned by the interface is as large as
few?
Does the role of Link-LSA in OSPFv3 not include?
display interface GEO/O/O once, and found that the Total Eror count (the total number of error packets at the physical layer of the interface) is not correct. . At this time, it can be concluded that the current time and fall has not disappeared.
Network administrator A wants to use the IP Prefix List to match a specific route entry. Which of the following routes will
Matched by the IIP Prefix List in the figure?
On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2 and R5. In AS 65000, R1, R3, R4, and R6 each establish IBGP peer relationships with R2 and R5. R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. The IBGP peer relationships are established using Loopback0. The IP address of Loopback0 on each router is 10.0.X.X/32, and the router ID is 10.0.X.X, where X is the number of the router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import-route command. Which of the following statements are true?
As shown in the figure, OSPF is enabled on all interfaces of the router, and the ip address identified in the figure is the device's IP address.
Loopback0 presses the IP address of the port, RI, R2, R3EJLoopbacD is advertised in the area 1, R4
LoopbacfkD advertises in area D and which of the following functional addresses can be pinged between the LoopbackD announcements of R5 and R5 in area 2?
Areal
10.0.1.1/32
A,10.0.3.3 10.0.5.5
B,10.0.4.4and10.0.2.2
C,10.0.2.2and10.0.3.3
D,10.0.2.2 10.0.5.5
Which of the following statements about 1S-IS (IPv6) is true?
IPSG is a source IP address filtering technology based on Layer 3 interfaces. It prevents malicious hosts from forging authorized hosts' IP addresses to access authorized network resources.
Regarding the MPLS forwarding process, the description of Ingress node forwarding is correct:
Qing technology is a technology to expand VLAN space. It can achieve the function of expanding Vian space by adding a layer of 8D2.1Q Tag on the basis of 8Q2.12 tag message. Which of the following statements about qinq is false?
The ipv6 enable topology standard has been set in the S-IS protocol view. The meaning of this command is:
Pv4 shares a topology with IPv6.
Network administrator A wants to use A, CL to match specific routing entries. Which of the following routing entries will be matched by the A, CL rules in the figure?
acl number 2000
rule 10 permit source 10.0.0.0 0.0.6.0
If the temperature of the device is found to be too high, it can be concluded that the fan has failed
As shown in the figure, MPLS LSP is set up in the network, and the goal is to establish an LDP session between SWA and SWB.
For high reliability purposes, the following LDP messages are transmitted through TCP: discovery messages, session messages, advertisement messages, and notification messages.
Run the display ip interface GEO/D/D command to view statistics about ping packets received on the interface.
multiple equal-cost routes may appear. About the IS-IS network , which of the following descriptions is false?
BGP4+ carries the next hop address of the IPv6 route through the Next Hop attribute in the Update packet. (Moved into Attribute 14)
An engineer uses two routers to test IPv6 services, and simulates the headquarters and branches by running BGP4+
of interconnection. As shown in the figure, an engineer captures packets to view the update packets sent by R1. About this message
Description of information, which of the following statements is correct
On a stable network that requires fast route convergence, you can change the value of the interval at which OSPF LSAs are updated to 0 so that topology or route changes can be immediately advertised on the network through LSAs, which speeds up route convergence.
To prevent hackers from attacking user devices or networks through MA, C addresses, you can configure the MA, C addresses of untrusted users as black hole MA, C addresses to filter out illegal MA, C addresses.
When 0SPFV2 evolves to 0SPFV3, the LSA format and function are exactly the same, but the network layer in the LSA address from IPv4 to IPv6o
How many bits are there in the label field of PLS?
What types of Link Types are included in the Router LSA in OSPF?
When configuring the DHCP Relay function on the device, the VLAN ANIF interface of the relay connection client must be bound with a DHCP server group, and the IP address of the proxy DHCP server must be configured in the bound DHCP server group.
The cutover risk assessment mainly considers which of the following aspects?
esigth uses different colors to distinguish different alarm levels, red represents emergency, orange represents important, and yellow represents
The table is secondary, and blue represents the prompt. Which of the following statements about different alarm levels is correct: (multiple choice)
MPLS is called Multi-Protocol Label Switching. Regarding the label description in MPLS, the correct one is:
On the OSPFv3 network shown in the figure, OSPFv3 parameters use default values. The LSDB is checked on one of the devices. The router IDs of R1, R3, and R4 are 10.0.1.1, 10.0.3.3, and 10.0.4.4, respectively. The Origin Router part of some LSAs is hidden. Complete this part. (Tokens can be reused.)
Which of the following reasons may cause the hosts in the same--VLAN LAN to fail to communicate with each other
Since BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors.
The routing policy deployed between IBGP neighbors is invalid.
What is the default aging time of the MA, C address table of Huawei switches?
Which of the following statements about the MP_REA, CH_NLRI attribute of BGP4+ is correct?
On a BGP/MPLS IP VPN network, which of the following are carried when a PE advertises VPNv4 routes?
If the display ospfv3 peer verbose command is run to check OSPFv3 neighbor information, the command output contains information such as the peer router ID, global unicast address of the peer interface, and neighbor status.
On the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is 10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that the LSA is generated by R2 and describes the IPv6 prefix address associated with the Router-LSA.
Which of the following sequences can be matched by the regular expression 100.S
As shown in the figure, MPLS/BGP IPVPN is deployed on the network. The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface. After the configuration is complete, it is found that CE1 and CE2 cannot learn routes from each other. Run the command to check the error on PE2. The neighbor information is shown in the figure, what is the most likely cause of the problem?
In OSPF, the A, BR will convert all type 7 L SAs in the NSSA area to type 5 L SAs.
Network administrator A wants to use AS-Path Filter to match the BGP routing attribute AS_PATH[100200300]. Network administrator A sorts out the four configurations in the figure. Which of the following configurations can meet the requirements of network administrator A?
As shown in the figure, a park has deployedIPv6For business testing, the network has4router. run
0SPFV3Realize network interconnection. about theOSPFV3network generatedLSA. Which of the following statement it's wrong?
As shown in the figure, the network has a loop because STP is not enabled. Which of the following phenomena may be bowed?
A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where R1 and R2 both have OSPF enabled, and function as the gateways of PCI and PC2, respectively. Given this, which of the following statements is false?
After basic QinQ is configured on an interface of a switch, the switch adds the default VLAN tag of the interface to packets only when the interface receives tagged packets. In this way, the VLAN space is expanded.
OSPF requires that routers in the same area have the same link state database (LSDB). As the number of routes on the network increases, some routers cannot carry so much routing information due to limited system resources. This state is called database overflow. If the Isdb-overflow-limit number 7 command is run on all routers on an OSPF network, which of the following conditions are likely to cause routers to enter the overflow state?
As shown in the figure, the MP_BGP neighbor relationship is established between PE1 and PE2 through the LoopbackO interface. After the configuration is complete, it is found that CE1 and CE2 cannot learn routes from each other. Which of the following options will cause this problem.
Which of the following are documents that need to be handed over as part of the wrap-up of a structured network troubleshooting process
files?
A, Maintenance suggestions to avoid this fault
B. Troubleshooting Summary Report
C. Troubleshooting Procedure Documentation
D. slightly
BFD for OSPF refers to the association of BFD with OSPF to speed up OSPF's response to network topology changes. The OSPF neighbor relationship can enter the Full state only after the BFD session goes up. The OSPF neighbor relationship can go down only after the BFD session goes down.
The traditional BGP 4 can only manage IPv4 single routing information. In order to provide support for a variety of network layer protocols, MP-BGP extends BGP-4. MP-BGP uses address families to distinguish different network layer protocols. Which of the following address families are currently supported?
A campus has deployed IPv6 for service testing. In the early stage of deployment, engineers wanted to achieve network interoperability through IPv6 static routes. When creating an IPv6 static route. You can specify both the outbound interface and the next hop, or only the outbound interface or only the next hop.
Which of the following actions may affect the normal operation of the customer's network?
Which of the following statements about MUX VLANs are true?
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