IEIF expands the functions of OSPF by taking advantage of the strong expansibility of OSPF. To enable it to support IPv6 networks, the expanded protocol is called OSPFv3. OSPFv3 is compatible with OSPFv2.
In the MPLS network, there are different operation types for labels, among which the meaning of the "pop" action is:
To protect a device against the attacks of forged BGP messages, you can configure GTSM to check whether the TTL value in the IP message header is within the specified range. If the peer x.x.x.x valid-ttl-hops 100 command is configured on a device, the valid TTL value range of the detected message is [155, 255].
The IS-IS neighbor relationship between R3 and R1 is not established. According to the information in this figure, what is the possible reason?
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?
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.
I-SPF and PRC can speed up ISIS route convergence. PRC does not calculate nodes. Instead, it updates routes based on the shortest path tree (SPT) calculated using the SPF algorithm.
Network administrator A wants to use the AS-Path Fiter to match the routing entries of the BGP routing attribute AS_PATH [100 200 300]. Network administrator A sorts out the four configurations in the figure. Which of the following configurations can satisfy network administrator A's requirements? Require?
Part of the configuration of R1 is as follows. Which statement about IS-IS on R1 is correct?
3vpn-instarwce rr
level- 2
cost-style wide
-erntity 47.ccOa 3eft)btxlci-dael
In addition to virtual connections, what type of IPv6 address is the source IPv6 address of OSPFv3's Hello text?
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?
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.
As shown below:
IR2] ad 2000
[R2-ad-basic-2000]rule deny
[R2-ad-basic-2000]quit
#
[R2] ospf
[R2-ospf»1]area 1
[R2-ospM-area-0.0.0.1] filter 2000 import
[R2-ospf-1-area-0.0.0,1] quit
[R2-ospf-1] default-route-advertise always
In BGPIMPLS IP VPN, if the OSPF protocol is used between PEs and CEs to exchange routing information, the domain identifier (Domain ID) is used to distinguish whether the incoming routes in the VPI instance come from the same OSPF domain.
[According to this picture, Peimen can judge?
cR3>display ipv6 routing-table protocol isis
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?
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.
Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PCI to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PCI cannot match PCI.) (Tokens can be reused.)
MPLS is called Multi-Protocol Label Switching. Regarding the label description in MPLS, the correct one is:
In PLSVPN, in order to distinguish IPv4 prefixes that use the same address space, the value of R0 is added to the IPv4 address. The correct description of the following options is:
You have set IS-IS IPv6 enable under the interface, what is the meaning of this command?
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.
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?
In an MPLS VPN network, data packets are forwarded when they enter the public network. will be encapsulated with two layers of MPLS labels
sign. Which of the following options describes the processing of the packet correctly:
As shown in the figure, in a medium-sized network, BGP generally deploys dual RRs to improve R reliability. When deploying dual RRs, the Cluster IDs of the two RRs are generally set to be the same. The reason for this is
Which of the following statements about the MP_REA, CH_NLRI attribute of BGP4+ is correct?
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
On the OSPF network shown in the figure, area 1 is a stub area, area 2 is a totally stub area, and area 3 is an NSSA. Which of the following LSAs does not exist in areas 1, 2, and 3?
Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?
Which of the following reasons may cause the hosts in the same VLAN of the LAN to fail to communicate with each other?
Which of the following statements about LDP Label Retention - Free Way is true:
To ensure security, authentication can be configured in the OSPFV3 process area view.
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?
The configuration shown is performed on R2 to filter all incoming routes. Suppose there is a BGP route with the AS_Path attribute of [100200300400] on R1 that needs to be sent to R2. Please help the network administrator to adjust the AS order in the AS_Path attribute of the route on R1 to ensure that the route entry will not be filtered by the routing policy of R2____, ____, ____, ____.
100 This space corresponds to the [A] space in the routing policy
200 This space corresponds to the [B] space in the routing policy
300 This space corresponds to the [C] space in the routing policy
400 This space corresponds to the [D] space in the routing policy
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?
Which of the following descriptions is correct about configuring static LSPs in MPLS networks?
Assuming that the neighbor relationship between BGP routers has been established successfully, the configuration on R1 is shown in the figure. ask for R1
Which router can the route entry 10.10.10.0/24 be delivered to the farthest?
AS 200
bgp 100
peer 13.X3 as-number 300
peer B3.33 connect * interface LoopBackO peer 3.33.3 route-policy COMMUNITY e»porx peer 3333 next >hop-local
peer Xl.3.3 advertise-cofnmunity
network 10.10.T0.0 24
route^poktcy COMMUNITY permit node 10 prefix COMMUNITY spply cocYWTUiiMty route-policy COMMUNITY permit node 20 «p ip prefix COMMUNITr index 10 permit
About the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?
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.)
If end-to-end QoS is configured on an MPLS network, the penultimate hop device on the MPLS network can pop MPLS labels from packets based on penultimate hop popping (PHP), so that the egress node can process packets based on the QoS priority in inner packets.
On the ISIS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. In this case, R3 can learn this default route through IS-IS.
On an MPLS network, after an LSR receives a Hello message from a peer, the LSR establishes an LDP adjacency with the peer. The Hello message is sent in multicast or unicast mode.
On a PIM-SM multicast network, a network engineer finds that multicast clients cannot receive multicast data. Which of the following is not a possible cause of this problem?
R1 executes the operation ping -a lO.l.Ll 10.5.16.2, what is the meaning of this command?
After the VLAN-based MA, C address flapping detection function is configured, if the MA, C address flaps. The interface can be configured to perform actions according to requirements. Which of the following is NOT a configurable action?
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?
Which of the following reasons may cause the hosts in the same--VLAN LAN to fail to communicate with each other
In the topology shown in the figure, the entire network runsOSPFv3agreement inNoIn the case of attracting external routes,R1which type ofLAS?
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.
When deploying BGPIMPLS IPVPN, when two VPNs have a common site, the common site must not use overlapping address space with other sites of the two VPNs.
Which of the following statements is false when troubleshooting the dual-active failure of a VRRP backup group?
A campus deploys both IPv4 and IPv6 networks for service testing, and runs IS-IS to realize network interconnection. The IS-IS routing protocol has good scalability and is widely used in the existing network. Which of the following statements is true about IS-IS scalability?
Regarding the description of the encapsulation format of labels in MPLS, the correct one is
In OSPF, the A, BR will convert all type 7 L SAs in the NSSA area to type 5 L SAs.
In the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, it will send it.
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.
As shown in the figure, OSPF is deployed in a campus, and Area 1 is deployed as an NSSA area. In the case of missing header, R2 will automatically generate a missing header route of Type 7 LSA and flood it in the NSSA area
On the network shown in the figure, OSPF is deployed on R1 and R2. IS-IS is deployed on R2 and R3. To enable R1 to obtain the route to 10.0.3.3/32, ISIS routes are imported into OSPF on R2. In this case, the next hop address to 10.0.3.3/32 in the routing table of R1 is_____.
Which of the following is not part of the preparatory work for the cutover plan?
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?
Ethernet is a broadcast-enabled network, and once there are loops in the network, this simple factory broadcast mechanism can have disastrous consequences. Which of the following phenomena may be caused by loops?
As shown in the figure, OSPF is enabled on all the routers. The IP address marked in the figure is the IP address of the loopbackO interface of the device. The LoopbackO of R1 and R2 is advertised in area 1, the LoopbackO of R4 is advertised in area 0, and the LoopbackO of R3 and R5E is advertised in area 0. In area 2, which of the following IP addresses can ping each other?
The IS-IS Level-1 neighbor relationship between R3 and R4 is not established. According to the information in this figure_What is the possible reason?
Basic QinQ can choose the outer tag encapsulation method according to the business type.
The Router LSA of a router is shown in the figure. Which of the following statements is wrong?
During the process of viewing the debug input through the SSH terminal, there is a lot of pop-up information. Which of the following operations can make the monitor terminal no longer pop up the debug message?
On the network shown in the figure, VRRP is configured on Rl and R2, and the virtual IP address is 10.0.12.254. After the configuration is complete, the network engineer checks the VRRP status on R1 and R2, and finds that both devices are in the Master state. Which of the following is not a possible cause of this problem?
Which of the following is included in the routine collection of basic equipment information?
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?
An engineer uses two routers to test IPv6 services, and runs 0SPFv3 to implement IPv6 network interconnection. R1 is required to be able to access the loopback interface address of R2. The engineer checked the OSPFv3 routing table entry of R1, as shown in the figure, and found that there was no route to the loopback interface address of R2. Which of the following reasons could not be the cause?
MPLS supports nesting of multiple labels. After receiving an MPLS packet, a device first processes the label next to the Layer 2 header, that is, the top MPLS label.
The Discovery message of LDP is used for neighbor discovery, and LDP has different discovery mechanisms when discovering neighbors. The following statement about the Discovery message in the basic discovery mechanism is correct
On the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA. Which of the following LSAs is displayed only in area 2?
CutoverThe previous information collection can be used to determine whether the services before and after the cutover are normal.
There is a concept of forwarding equivalence class (FEC-Fowarding Equivalence Class) in MPLS, so FEC does not
Can the allocation be made based on which of the following criteria?
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TESTED 27 Dec 2024
