H12-261_V3.0 Exam Info and Free Practice Test All-in-One Exam Guide Jul-2022
Pass Huawei H12-261_V3.0 Actual Free Exam Q&As Updated Dump Jul 13, 2022
NEW QUESTION 123
There are the following topology diagrams, the following statements are correct:
- A. There is a route with destination network segment 10.0.2.2/32 on R1
- B. There is no route with the destination network segment 10.0.3.3/32 on R1
- C. There is a route with the destination network segment 10.0.3.3/32 on R1
- D. There is no route with the destination network segment 10.0.2.2/32 on R1
Answer: A,B
Explanation:
Explanation
Note that R2 is configured with Set-overload
NEW QUESTION 124
Which of the following descriptions is correct about the FTP protocol?
- A. FTP always uses one TCP session to transfer control information and data information
- B. existFTP In Passive mode, the client completes the control and dataInitialization of a TCP session
- C. FTP always uses TCP port 20 for data sessions and ICP port 21 for control sessions
- D. existFTP In Active mode, the server side passes the command"PORT" to tell the client which port it expects to send data on
- E. FTP always uses TCP port 21 for data sessions and TCP port 20 for control sessions
Answer: B
Explanation:
Explanation
FTP (File Transfer Protocol, file transfer protocol) YesTCP/IP One of the protocols in the protocol group.The FTP protocol consists of two componentspoints, one of which isThe FTP server, and the second is the FTP client.
By default, the FTP protocol uses two TCP ports, 20 and 21, where 20 is used to transmit data and 21 is used to transmit control information. However, whether to use 20 as the port for data transmission is related to the transmission mode used by FTP. If the active mode is used, the data transmission port is 20; if the passive mode is used, the specific port to be used is determined by the server and the client through negotiation.
NEW QUESTION 125
The IPv6 link-local address can be generated through stateless automatic configuration.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 126
an engineer uses 2 router for IPv46 business test, by running BGP4+Simulate the interconnection between headquarters and branches. The network logical topology is shown in the figure, about the IPv6 between the two devices Route delivery, which of the following statements is false?
- A. likeUpdate NP is carried in the packet. REACHL NLRI Attribute, indicating that reachable routes are advertised
- B. When routing, it will carry AS. _Path and other recognized mandatory attributes
- C. BGP4+ passUpdate Packets transmit routing information between peers
- D. When routing is passed, Next_ Hop Attribute must be IPv46 Global Unicast Address
Answer: D
NEW QUESTION 127
Which of the following descriptions about the LDP session establishment process is correct? (multiple choice)
- A. TCPAfter the connection is established successfully, the active party sends an initialization message to negotiate the relevant parameters for establishing an LDP session.
- B. When both parties receive the Keepalive message from the peer, LThe DP session is established successfully.
- C. LThe hello message discovered by DP neighbors uses TCP packets, and the destination address is the multicast address 224.0.0.2.
- D. The party with the larger transport address, as the active party, initiates the establishment of a TCP connection.
Answer: A,B,D
Explanation:
Explanation
LThe DP link Hello message uses UDP packets, and the destination address is the multicast address 224.0.0.2.
pass throughAfter the Hello message discovers the neighbor, an LDP session is established between the LSRs.
After a session is established, LDP peers maintain this session by continuously sending Hello messages and Keepalive messages.
NEW QUESTION 128
In a broadcast network, the process starts after the neighbor relationship is established.DIS elections.
- A. false
- B. True
Answer: B
Explanation:
Explanation
After the two sides of ISIS established a neighbor relationship,DIS is also elected at the same time (send 2 PieceAfter the Hello message), both parties begin to send local link state messages (LSPs) to the peer.
NEW QUESTION 129
Since BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors, and it is invalid to deploy routing policies between IBGP neighbors
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 130
Regarding the authentication of the ISIS protocol, the correct statement is:
- A. Interface authentication can authenticate the Hello packets of Leve1-1 and Leve1-2
- B. After configuring area authentication, the IIH, SMP, and LSP sent by the router must carry the authentication TLV.
- C. After configuring interface authentication, the IIH sent by the router must carry the authentication TLV
- D. The two routers are configured for area authentication and interface authentication respectively, and the passwords are the same, then the two routers can establish a neighbor relationship
Answer: A,C,D
NEW QUESTION 131
In the dual network, the correct statement about the ISIS protocol routing is:
- A. To support dual stack, the ISIS protocol must be changed to version 2.
- B. The cost of ISIS in IPv4 and IPv6 can be adjusted independently.
- C. The routing priority in ISIS IPv4 and ISIS IPY6 cannot be adjusted independently.
- D. By default, the routing priority of the ISIS protocol in IPv6 is 25
Answer: B
NEW QUESTION 132
The RSTP protocol provides a variety of protection functions. For example, when the edge port is configured in the protection state, the processing method after the edge port receives the BPDU message is:
- A. Close the port
- B. Forward BPDUs as required
- C. Obtain relevant information after parsing the BPD service
- D. Directly discard the BPDUs
Answer: A
NEW QUESTION 133
Does the switch role in the stacking system not include?
- A. candidate switch
- B. master switch
- C. standby switch
- D. slave switch
Answer: A
NEW QUESTION 134
Which of the following descriptions about the OSPF protocol are correct?
- A. AS-External-LSA describes the path to the AS external route, and the flooding range is AS external
- B. AS-External-LSA Describes the path from the router to the ASBR
- C. AS-External-LSA does not belong to any area
- D. The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value
Answer: C,D
NEW QUESTION 135
Which of the following statements about BGP route filtering is incorrect?
- A. Route- The filtering relationship between the nodes of the Policy is"Or", that is, as long as it passes the filtering of a node, it can pass the Route- Policy.
- B. on receivingBGPWhen routing peers, implement routing policies to filter unnecessary BGP routes, and these routes will not be added to the local BGP routing table.
- C. For locally advertised routes, configure routing policies, which take effect before adding routes to the BGP routing table.
- D. In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationship.
Answer: C
NEW QUESTION 136
man-in-the-middle attack or IP/MAC SpoofingAttacks can lead to information leakage and other hazards, and are more common in intranets. To prevent man-in-the-middle attacks or IP/MAC SpoofingAttack, the configuration methods that can be taken are:
- A. Configuration on the master switchDHCP Snooping withDAL or IPSG for linkage
- B. turn onDHCP Snooping checkDHCP Function of the CHADDR field in the REQUEST message
- C. Limit the maximum number of learning allowed on a switch interfaceMACnumber of addresses
- D. configureTrusted/Untrusted interface
Answer: A,B,D
NEW QUESTION 137
If the network runs the OSPP protocol, configure the non-backbone area in the OSPP area as Totaly After the stub area, ABThe R router will send Totally An L is delivered to the stub areaS LSA whose ID is 0.0.0.0, which type of LSA does this LSA belong to??
- A. LSA3
- B. LSA2
- C. LSA5
- D. LSA1
Answer: A
Explanation:
Explanation
Totally Stub will AB againR generates a type 3 default, and then there is no type 3 LSA inside the area.
NEW QUESTION 138
Which of the following descriptions about link-state routing protocols is correct without dividing areas?
- A. Each router establishes a topology of the entire flooding domain
- B. Routers throughout the flood domain have the same link-state database
- C. Each router learns routing entries directly from routing updates and adds them to the routing table
- D. The router will send all link state information from one neighbor to all other neighbors to ensure the synchronization of the database
- E. Routers in a flood domain may receive the same link state information repeatedly
Answer: A,B,E
Explanation:
Explanation
The link-state routing protocol updates the link-state database and then performs routing calculations. So B is wrong.
NEW QUESTION 139
traditional BGP-4 can only manage IPv44 Unicast routing information, MP-BGP for In order to provide support for a variety of network layer protocols, BGP-4 expanded. MP-BGP Address families are used to distinguish different network layer protocols. Which of the following address families are currently supported?
- A. BGP-VPNv 4 address family
- B. BGP-IPv4 broadcast address family
- C. BGP-VI Instance IPv6 address family
- D. BGP-IPv6 Unicast address family
Answer: A,C,D
NEW QUESTION 140
Which of the following statements about VXLAN packets is correct?
- A. VNI has 24 bits for distinguishing VLAN segments
- B. The outer destination IP address is VXLAIP address of the remote VTEP of the N tunnel
- C. The source UDP port number is 4789
- D. PurposeUDP port number is 4789
Answer: A,B,D
Explanation:
Explanation
VXLAN (Virtual eXtensible Local Area Network, virtual extended local area network), is NVO3 (Network Virtualization) defined by IETF over Layer 3) One of the standard technologies, using L2 over L4 (MAC-in-UDP) packet encapsulation mode, which encapsulates Layer 2 packetsEncapsulation with the Layer
3 protocol can realize the expansion of the Layer 2 network within the scope of the Layer 3, and at the same time meet the needs of the large Layer 2 virtual migration and multi-tenancy of the data center.
VTEP (VXLAN Tunnel Endpoints, VXLAN tunnel endpoints): VXLAThe edge device of the N network is the start and end point of the VXLAN tunnel, and the related processing of VXLAN packets is performed on this.
VNI (VXLAN Network Identifier, VXLAN network identifier):
VXLAThe N header and the original Ethernet frame are used as UDP data. In the UDP header, the destination port number (VXLAN Port) is fixed to 4789, the source port number (UDP Src. Port) is the value of the original ether frame calculated by the hash algorithm.
source IP address (Outr Src. IP) is the V to which the source VM belongsThe IP address of the TEP, the destination IP address (Outer Dst. IP) is the V to which the destination VM belongsIP address of the TEP.
Source MAC address (Src. MAC Addr.) is the MAC address of the VTEP to which the source VM belongs, and the destination MAC address (Dst. MAC Addr.) is the MAC address of the next-hop device on the path to the destination VTEP.
NEW QUESTION 141
by default, which of the following are safeMAC Will the entry of the address type be lost after the device restarts? (single choice)
- A. sticty MAC address
- B. Secure static MAC address
- C. Secure dynamic MAC address
- D. Black hole MAC address
Answer: C
NEW QUESTION 142
You need to configure policy routing on the router to specify that specific traffic should be forwarded through an interface. When using policy-based routing, which two The most typical information that can be used to forward traffic along a specific path?
- A. Source IP address and specific protocol(such as FTP, HTTP Wait)
- B. packetTTL and source IP address
- C. source IPaddress and Layer 2 source address
- D. Type of Service header and message length
Answer: A
NEW QUESTION 143
The intranet users of a company use the no-pat mode of NAT to access the Internet. If all the public network IP addresses are used, what will happen to the intranet users who access the Internet subsequently?
- A. Squeeze out the previous user and force NAT conversion to access the Internet
- B. Synchronize the message to other MT conversion devices for NAT conversion
- C. Subsequent intranet users will not be able to access the Internet
- D. Automatically switch from NAT to PAT to access the Internet
Answer: C
NEW QUESTION 144
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