When the host accesses the web server of the server, the value of the network layer protocol field is 6.
- A . True
- B . False
A network engineer prompts the following information when entering the command line:
Error: Unrecognized command found at ‘^’ position. Which statement is correct about this prompt message?
- A . The input command is incomplete
- B . The parameter type is wrong
- C . The input command is ambiguous
- D . Keyword not found
As shown in the figure, there are three data packets captured by the administrator in the network. Which of the following statements is wrong?
- A . None of the three packets contain application layer data
- B . These three data packets represent the three-way handshake process of TCP
- C . The telnet client uses port 50190 to establish a connection with the server
- D . The IP address of the telnet server is 10.0.12.1, and the IP address of the telnet client is 10.0.12.2
On the command line interface of the Huawei AR router, the save command is used to save the current system time.
- A . True
- B . False
Which statement about the transport layer protocol is correct? (Multiple choice)
- A . The establishment of a TCP connection is a three-way handshake process, while the termination of a TCP connection requires a four-way handshake
- B . UDP uses the SYN and ACK flags to request and confirm connection establishment
- C . Well-known port numbers range from 1-1023
- D . UDP is suitable for transmitting delay-sensitive traffic and can be reassembled according to the sequence number field in the packet header
The tracert diagnostic tool in Huawei routers is used to trace the forwarding path of data.
- A . True
- B . False
In which of the following network types does OSPF need to elect DR and BDR? (Multiple choice)
- A . Broadcast type
- B . Point-to-point type
- C . Point-to-multipoint
- D . NBMA
Which of the following statements about static routing is wrong?
- A . Manual configuration by network administrator
- B . Routing information needs to be exchanged between routers
- C . Cannot automatically adapt to changes in network topology
- D . Low requirements on system performance
Which frequencies does the IEEE 802.11n standard support? (Multiple choice)
- A . 6GHz
- B . 2.5GHz
- C . 2.4GHz
- D . 5GHz
In the network shown in the figure below, what commands can be entered on the router to enable host A to ping host B? (Multiple choice)
- A . RTA: ip route-static 0.0.0.0 0.0.0.0 11.0.12.2
RTB: ip route-static 0.0.0.0 0.0.0.0 11.0.12.1 - B . RTA: ip route-static 10.0.12.5 255.255.255.252 11.0.12.2
RTB: route-static 10.0.12.1 255.255.255.252 11.0.12.1 - C . RTA: ip route-static 0.0.0.0 0.0.0.0 11.0.12.1
RTB: ip route-static 0.0.0.0 0.0.0.0 11.0.12.2 - D . RTA: ip route-static 10.0.12.5 255.255.255.252 11.0.12.1
RTB: ip route-static 10.0.12.1 255.255.255.252 11.0.12.2
On the VRP operating platform, which of the following commands can only view static routes?
- A . display IP routing-table
- B . display IP routing-table statistics
- C . display IP routing-table verbose
- D . display IP routing-table protocol static
A router running the OSPF protocol can only reach the FULL state after completing LSDB synchronization.
- A . True
- B . False
All router interfaces belong to the same broadcast domain.
- A . True
- B . False
Which of the following protocol types does the OSPF protocol support? (Multiple choice)
- A . Point-to-multipoint
- B . Point-to-point type
- C . Broadcast type
- D . NBMA
When using the ping command on the VRP platform, if it is necessary to specify an IP address as the source address of the echo request message, which of the following parameters should be used?
- A . -d
- B . -a
- C . -s
- D . -n
Which of the following OSPF protocol packets can ensure the reliability of LSA update?
- A . DD
- B . LSR
- C . LSU
- D . LSACK
What are the stable states of the OSPF protocol neighbor relationship? (Multiple choice)
- A . 2-way
- B . Full
- C . Down
- D . attempt
Must all interfaces of routers running OSPF belong to the same area.
- A . True
- B . False
Can dynamic routing protocols automatically adapt to changes in network topology.
- A . True
- B . False
As shown in the figure below, host A and host B cannot communicate.
- A . True
- B . False
As shown in the figure, when the switch needs to forward the frame whose destination mac address is 5489-98ec-f011, which of the following descriptions is correct?
- A . The switch will send a destination unreachable message to the source device
- B . The switch does not find a matching entry in the mac address table, so it will drop the frame
- C . The switch needs to send a request to discover the device with the mac address 5489-98ec-f011
- D . The switch will flood the frame on all ports except the port that received the frame
According to the command output shown in the figure, which of the following descriptions is correct? (Multiple choice)
- A . GigabitEthernet0/0/1 allows VLAN1 to pass through
- B . GigabitEthernet0/0/1 does not allow VLAN1 to pass through
- C . If you want to change GigabitEthernet0/0/1 into an Access port, you first need to use the command "undo port trunk allow-pass vlan all"
- D . If you want to change GigabitEthernet0/0/1 into an Access port, you first need to use the command "undo port trunk allow-pass vlan 2 to 4094"
According to the command shown in the figure, which of the following descriptions is correct? (Multiple choice)
- A . The PVID of port GigabitEthernet0/0/1 is 1
- B . The PVID of port GigabitEthernet0/0/2 is 1
- C . The PVID of port GigabitEthernet0/0/2 is 10
- D . The PVID of port GigabitEthernet0/0/1 is 10
If the Length/type=0x8100 of an Ethernet data frame, which of the following statements is correct?
- A . The upper layer of this data frame must have a UDP header
- B . There must be a TCP header in the upper layer of this data frame
- C . This data frame must carry VLAN TAG
- D . The upper layer of this data frame must have an IP header
The bridge ID of the STP protocol in the switching network is as follows. Which of the following bridge ID switches will become the root bridge?
- A . 4096 00-01-02-03-04-DD
- B . 32768 00-01-02-03-04-AA
- C . 32768 00-01-02-03-04-BB
- D . 32768 00-01-02-03-04-CC
Which of the following statements about the election of active ports in link aggregation LACP mode is correct?
- A . Compare the interface priority first, if you cannot determine the superior one, continue to compare the interface number, the smaller the better
- B . Only compare interface priorities
- C . Compare device priorities
- D . Only compare interface numbers
The MAC address of the existing switch is shown in the figure, which of the following statements is correct?
- A . When the switch restarts, the MAC address learned by port Eth0/0/2 does not need to be relearned
- B . The data frame with source MAC address 5489-9885-18a8 and destination MAC address 5489-989d-1d30 learned from the port is forwarded from Eth0/0/1 port
- C . The data frame with source MAC address 5489-9811-0b49 and destination MAC address 5489-989d-1d30 learned from the port is forwarded from Eth0/0/2 port
- D . When the switch restarts, the MAC address learned by port Eth0/0/3 needs to be relearned
As shown in the figure below, all hosts can communicate normally. Which of the following statements is correct? (Multiple choice)
- A . G0/0/3 of SWB learned 2 mac addresses
- B . G0/0/3 of SWA learns a mac address
- C . G0/0/3 of SWA learns 2 mac addresses
- D . G0/0/3 of SWA learns 3 mac addresses
Which of the following statements about Hybrid ports is correct?
- A . The Hybrid port can strip the tags of certain vlan frames in the direction of the outgoing port
- B . When the Hybrid port sends a data frame, it must carry the vlan tag
- C . Hybrid ports only receive data frames with vlan tag
- D . Hybrid port does not require PVID
The function of telnet.read_very_eager in Telnetlib is to read data non-blockingly. Usually needs to be used together with the time module.
- A . True
- B . False
For a switch running the STP protocol, the port can be directly converted to the Disabled state in any state.
- A . True
- B . False
The IPv6 address 2001:ABEF:224E:FFE2:BCCO:CDOO:DDBE:8D58 cannot be abbreviated.
- A . True
- B . False
Using the commands "vlan batch 10 20 " and "valn batch 10 to 20 ", what is the number of VLANs that can be created?
- A . 11 and 11
- B . 2 and 2
- C . 11 and 2
- D . 2 and 11
The Layer 2 switch belongs to the data link layer device, which can identify the mac address information in the data frame, forward the data according to the mac address, and record these mac addresses and corresponding port information in its own mac address table.
- A . True
- B . False
In the configuration BPDU sent by the switch, which bridge ID cannot appear?
- A . 8192 00-01-02-03-04-CC
- B . 2048 00-01-02-03-04-CC
- C . 4096 00-01-02-03-04-CC
- D . 0 00-01-02-03-04-CC
If there is an inclusion relationship in the configured ACL rules, it should be noted that the rule numbers of the strict conditions need to be sorted first, and the rule numbers of the loose conditions need to be sorted last, so as to prevent the packet from stopping to continue matching due to hitting the rules of the loose conditions, thereby Rules that make it impossible to hit strict conditions.
- A . True
- B . False
The network administrator configures the Huawei router RTA as shown in the figure. If a user needs to be authenticated in the authentication domain "huawei", which of the following descriptions is correct?
[RTA] aaa
[RTA-aaa] domain huawei
[RTA-aaa-domain huawei] authentication-scheme au1
[RTA-aaa domain-huawei] authentication-scheme au2
- A . will use "authentication-scheme au1" authentication
- B . "authentication-scheme au1" authentication will be used, if "au1" is removed, "au2" authentication will be used
- C . "authentication-scheme au2" authentication will be used, if "au2" is removed, "au1" authentication will be used
- D . will use "authentication-scheme au2" authentication
What is the number range of Layer 2 ACL?
- A . 4000-4999
- B . 2000-2999
- C . 6000-6031
- D . 3000-3999
What is the number range of the advanced ACL?
- A . 2000-2999
- B . 4000-4999
- C . 6000-6031
- D . 3000-3999
If the packet matches the ACL and the result is "deny", the packet will be discarded eventually.
- A . True
- B . False
Which of the following message types does DHCP contain? (Multiple choice)
- A . DHCP OFFER
- B . DHCP REQUEST
- C . DHCP ROLLOVER
- D . DHCP DISCOVER
What is the main function of the DNS protocol?
- A . File Transfer
- B . Remote access
- C . Domain name resolution
- D . Mail transfer
Which of the following protocols is not a file transfer protocol?
- A . FTP
- B . SFTP
- C . HTTP
- D . TFTP
Only the security policy of WPA2-PSK supports the use of TKIP for data encryption.
- A . True
- B . False
Which of the following does not include the advantages of Wi-Fi6 over Wi-Fi5?
- A . Higher consumption
- B . Higher number of access terminals per AP
- C . Lower transmission delay
- D . Higher bandwidth
The port numbers used in the control tunnel and data tunnel transmission of CAPWAP are the same.
- A . True
- B . False
What is the first operation to be performed after the FIT AP obtains the IP address of the AC?
- A . Establish a CAPWAP tunnel
- B . Request a configuration file
- C . Download configuration file
- D . Upgrade the software version
Before the STA associates with the AP, it needs to exchange some messages to obtain the SSID. Which of the following are these messages? (Multiple choice)
- A . Probe Response
- B . Probe Request
- C . Beacon
- D . Discovery
Based on what concept is segment routing SR (segment routing) a protocol designed to forward data packets on the network?
- A . Policy Routing
- B . Source routing
- C . Routing Policy
- D . Destination routing
In PPP, when the two ends of the communication detect the activation of the physical link, they will transition from the link unavailable stage to the link establishment stage. In this stage, the link parameters are mainly negotiated through the () protocol
- A . IP
- B . LCP
- C . NCP
- D . DHCP