A switch running a later IGMP version can identify Report messages of an earlier IGMP version, but the switch running an earlier IGMP version cannot identify Report messages of a later IGMP version. To ensure that IGMP runs properly, you are advised to set the IGMP version on the switch to be the same as or later than the IGMP version of member hosts.
ASPF enables the firewall to support multi-channel protocols such as FTP and to define security policies for complex applications.
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?
The filter-policy 2000 export command is run in an ISIS process. Which of the following statements about the functions of a filter policy is false?
An edge port is a new port role added to RSTP to overcome the disadvantages of STP. Which of the following statements is false about this port role?
The traffic limiting policy feature only supports the number of connections initiated by the specified IP or the number of connections received.
Which of the following statements about multicast packet forwarding is true?
When creating a single-hop BFD session for the first time, bind the single-hop BFD session to the peer IP address and the local address. To modify a configured BFD session, delete it and create a new one.
Which of the following statements regarding the summary automatic command and BGP route summarization is false?
The Internet Assigned Numbers Authority (IANA) allocates Class D addresses to IPv4 multicast. An IPv4 address is 32 bits long, and the four most significant bits of a Class D address are 1110.
The BFD Echo function checks the connectivity of the forwarding link by looping back packets. Which of the following statements are true about this function?
Which of the following statements are true about the packet filtering firewall?
Which of the following attributes must be carried when BGP sends route update messages?
The Neighbor Discovery Protocol (NDP) is an important basic protocol in the IPv6 protocol suite and plays an important role. Which of the following functions and features does it support?
When deploying BFD, you need to adjust some parameters so that it can better detect the network status. Which of the following statements is false about BFD optimization?
In PIM-DM, which of the following processes are involved in SPT establishment?
When receiving a packet, a Huawei router matches the packet against ACL rules. The default ACL matching order used by the Huawei router is.
Which of the following statements regarding an IP prefix are true?
After BGP initiates a TCP connection, the ConnectRetry timer is disabled if the TCP connection is successfully established. If the TCP connection fails to be established, the device tries to reestablish the TCP connection when the ConnectRetry timer expires.
When multiple access channels are set for the same access requirement, the insecure access channels are not used and secure access channels are selected in normal cases. Which of the following are secure access channels?
This configuration is part of RTA configuration. Which of the following statements regarding the configuration are true?
[RTA] ospf 100
[RTA-ospf-100]silent-interface GigabitEthernet 1/0/0
iMaster NCE-Campus can be used as an authentication server on a WLAN to authenticate STAs.
The Interface \P address and VRRP virtual IP address can be the same.
As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA -> HAP -> HAC -> upper-layer network before roaming. What is the flow direction of data traffic after Layer 3 roaming?
Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.
Regarding the route-policy set-cost configuration below, which of the following statements is true?
OSPF has five types of packets, which have the same header format. If the Auth Type field in the packet header is 1, which of the following authentication modes is used?
On an OSPF network, interfaces are classified into four types based on link layer protocols. Which of the following types can interfaces on an IS-IS network be classified into based on physical links?
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode). Which AC will the connect to?
On the network shown in the following figure, the management VLAN is VLAN 10, and the AP is configured to obtain an IP address on the network segment 10.1.1.0/24 through DHCP. The AP, AC, and AR function as the DHCP client, DHCP relay agent, and DHCP server, respectively. Which of the following configurations for the DHCP relay agent and DHCP server are correct?
On an OSPF network, if two routers with the same router ID run in different areas and one of the routers is an ASBR, LSA flapping occurs.
On an OSPF or IS-IS network, the filter-policy import command can be run on a router to filter out the LSAs forwarded by its neighbors.
An IP prefix list is a common matching tool used in routing policies. Which of the following cannot be configured as matching conditions in an IP prefix list on a Huawei router?
BFD can quickly detect faults in channels at multiple network layers, ensuring high reliability. To which of the following layers does BFD belong?
An enterprise uses Huawei routers to deploy an IS-IS network for network-wide communication. An engineer wants to change the interface cost to control route selection. By default, which of the following values is the maximum cost that can be configured?
In BGP, the Origin attribute is used to identify the origin of a route. Which of the following statements are true about the Origin attribute?
In special scenarios, when advertising routes to an IBGP peer, a BGP device needs to set the next hop to its IP address to prevent blackhole routes. Which of the following commands can be run in this case?
After the administrator of an enterprise deploys a DHCP server, employees complain that their clients cannot obtain IP addresses from the DHCP server. Which of the following may cause this problem?
Similar to the OSPF DR, the IS-IS DIS needs to be elected on a broadcast network. However, the OSPF DR is preemptive by default, whereas the IS-IS DIS is not preemptive by default.
In IPv6, interface IDs can be manually configured, automatically generated by the system, or generated based on the IEEE EUI-64 standard.
In the OSPF protocol, intra-area route calculation involves only Router LSA, Network LSA, and Summary LSA.
During routine operation and maintenance, an engineer checks the IGMP configuration on RTA. The configuration is as follows:
Interface information of VPN-Instance: public net
GigabitEthernet0/0/1 (192.168.1.1):
IGMP is enabled
Current IGMP version is 2
IGMP state: up
IGMP group policy: none
IGMP limit: -
Value of query interval for IGMP (negotiated): -
Value of query interval for IGMP (configured): 60 s
Value of other querier timeout for IGMP: 0 s
Value of maximum query response time for IGMP: 10 s
Querier for IGMP: 192.168.1.1 (this router)
Given this, which of the following statements is false?
In BGP, the origin attribute of the routes imported using the import-route command is incomplete.
Which of the following statements regarding multicast MAC addresses are false?
Which of the following statements is false about BFD?
PBR is a mechanism for selecting routes based on user-defined policies. There are two types of PBR: interface-based PBR and local PBR. Which of the following statements is false about these two types of PBR?
A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?
Which of the following statements regarding the OSPF protocol is false?
An enterprise administrator wants to configure single-hop BFD to implement fast detection of direct links. Which of the following configurations are mandatory?
In an IPv4 address space, Class D addresses are used for multicast. Among Class D addresses, which of the following is the permanent group address range reserved for routing protocols?
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.
When an SSH client accesses an SSH server for the first time and the SSH server's public key is not configured on the SSH client, you can enable first-time authentication on the SSH client. This allows the SSH client to access the SSH server and saves the SSH server's public key on the SSH client. In this way, the next time the SSH client accesses the SSH server, the SSH client can use the saved public key to authenticate the SSH server.
Which of the following PIM protocol packets have unicast destination addresses.
On an OSPF network, LSDBs are used to store LSAs. Common LSAs include router LSAs and network LSAs. Which of the following items is not included in the 3-tuple that is used to uniquely identify an LSA?
On a broadcast IS-IS network shown in the following figure, a DIS needs to be elected to create and update pseudonodes. Which of the following routers is elected as the DIS?
Which of the following is used as the destination port for single-hop BFD?
During routine maintenance, an enterprise administrator runs a command to check VRRP group information. Which of the following statements is false about the command output?
yaml
CopyEdit
Vlanif100 | Virtual Router 1 State: Master
Virtual IP: 10.1.1.100
Master IP: 10.1.1.2
PriorityRun: 120 PriorityConfig: 120
DR: None BDR: None MTU: 0
Preempt: YES Delay Time: 20s
Remain: --
Track: YES Priority Reduced: 20
Auth Type: MD5
BFD-session State: UP
Which of the following parameters are not mandatory during the configuration of a BGP peer?
OSPF has multiple types of routes with varying priorities. Which of the following types of routes has the lowest priority when they have the same prefix?
IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.
Based on IGMP snooping, IGMP snooping proxy enables a switch to act as a substitute for an upstream Layer 3 device to send IGMP Query messages to downstream hosts, and also to act as a substitute for downstream hosts to send IGMP Report/Leave messages to an upstream device. As such, this function conserves bandwidth between the upstream device and the local device.
OSPF networks are classified into four types of networks by link layer protocol. Drag the following link layer protocols to the corresponding network types.(Token is reusable)
The Next_Hop attribute in BGP records the next hop of a route. Similar to the next hop in an IGP, the Next_Hop attribute in BGP must be the IP address of a peer interface.
On an RSTP network, port priorities may be compared during root port or designated port election. Which of the following values is the default priority of a port on a Huawei switch?
Route attributes are specific descriptions of routes. BGP route attributes can be classified into four types. Which of the following are well-known discretionary attributes?
On an office network of an enterprise, OSPF is enabled on two directly connected routers. During adjacency establishment, the state machine stays in the 2-way state. Which of the following statements are not possible causes?
A BGP device receives a route carrying an unknown attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers. Which of the following attributes is of this type?
RSTP provides different functions in different scenarios. Which of the following statements Is false?
OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.
In VRRP networking, if VRRP is not configured to track an uplink interface and the uplink interface or link of the master device in a VRRP group fails, no switchover will be triggered. As a result, a traffic blackhole occurs.
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.
Which of the following statements about the forwarding plane of a switch is false?
The native AC function allows an agile switch to integrate AC capabilities, achieving wired and wireless convergence. The agile switch centrally manages wired and wireless service traffic.
On an enterprise network, the directly connected interfaces of two OSPF routers are on different network segments and have different masks. To establish an OSPF neighbor relationship between the two interfaces, you can change their network types to which of the following?
Which of the following statements is false about the default processing of the next hop address when a BGP device advertises a route?
Match the following IPv4 multicast protocols with the corresponding functions.
On a WLAN, engineers can use the VLAN pool mechanism to assign access users to different VLANs, which helps reduce the number of broadcast domains and improve network performance. VLAN pools support two VLAN assignment algorithms: even and hash. Drag the advantages and disadvantages to the two algorithms.(Token is reusable)
GRE is a Layer 2 VPN encapsulation technology that encapsulates packets of certain data link layer protocols so that the encapsulated packets can be transmitted over an IP network.
IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.
Which of the following statements regarding different LSA types is false?