Switch stacking supports more than two devices, and multiple switches can be grouped into a logical device through stacking.

The Hybrid port can be connected to the user host or other switches.

When the lease period reaches what percentage does the DHCP client send the lease renewal message for the first time?

After FIT AP obtains AC's IP address, what is the first operation to perform?

FIT AP can work independently without relying on AC.

IPCP dynamic address negotiation can automatically obtain the address.

PAP authentication is more secure than CHAP authentication because it does not carry passwords in clear text.

Basic ACL number value range.

The two ends of the PPP link are not in the same network segment and cannot communicate.

There is no need to write a hop when writing static routes at both ends of the PPP link. The Ethernet link needs.

DHCP is an application layer protocol. In order to make it more reliable when assigning P, its transport layer uses TCP protocol.

The DHCP request message is sent by broadcast.

FTP transfer data at a time requires several TCP connections to be established.

The transport layer protocol has UDP and TCP, but UDP is more reliable than TCP.

UDP has a sliding window mechanism to control the speed of data transmission.

DNS is used for domain name resolution.

During data access, when accessing different network segments, the destination MAC encapsulates the MAC address of the gateway on the source host.

ARP request is sent by.

When accessing across network segments, the source and destination IP will change, and the source and destination MAC will not change.

Which layer of protocol does ARP belong to?

The router forwards data according to the IP routing table, and the Layer 2 switch forwards data according to the MAC address table.

Layer 3 devices like routers receive data frames based on () Forwarding data frames.

As shown in the figure, you only need to configure this static route on R1, and the two hosts can communicate with each other normally.

The priority of OSPF routing protocol is.

The role of the OSPF protocol is.

UDP is connectionless and must rely on () to ensure the reliability of transmission.

Use the command kdir test in the VRP operating platform. The system will create a directory named test.

Since the TCP protocol uses a three-way handshake mechanism when establishing a connection and closing a connection, TCP supports reliable transmission.

VRP operating system commands are divided into four levels: access level, monitoring level, configuration level, and management level. Which level can run various business configurations and set commands but cannot operate the file system?

UDP cannot guarantee the reliability of data transmission, and does not provide functions such as message sequencing and flow control. It is suitable for flows that do not require high transmission reliability, but require high transmission speed and delay.

What kind of packets does the OSPF protocol use to discover and maintain neighbor relationships?

VRP operating system commands are divided into four levels: access level, monitoring level, configuration level, and management level. Which level can run various business configuration commands but cannot operate the file system?

Using a traditional landline to make a call is a way of network communication.

In the VRP interface, use the command delete vrpcfg.zip to delete a file. The file must be emptied in the recycle bin to completely delete the file.

In what state does the OSPF protocol determine the master-slave relationship of packets?

The following two configuration commands can realize the router RTA. The main and backup routes to the same destination 10.1.1.0: ()

(RTA) ip route--static 10.1.1.0 2412.1.1.1 permanent (RTA) ip route--static 10.2.2.0 2413.1.1.1.

In the network shown in the figure below, the bridge ID of the switch has been marked. Enter the command stp rootsecondary on the switch and the following switch will become the root bridge of this network.

If the Length of an Ethernet data frame/Type = 0x8100, which of the following statements is correct?

FAT AP can independently complete wireless user access, wireless user authentication, and business data forwarding without AC.

In the WLAN network architecture, terminal devices that support the 802.11 standard are called?

The following statement about static routing is wrong

Which of the following IPv4 addresses can be used by a host to directly access the Internet?

The switch becomes a logical switch after stacking and clustering, and Eth-Trunk across physical devices can be deployed to improve network reliability.

What is the value of TPID defined by IEEE802.1Q?

When the Access type port sends a message, it will.

The management of users by NAS devices is based on domains. Each user belongs to a domain, and a domain is a group composed of users belonging to the same domain.

Which of the following statements about Prefix Segment is wrong?

What is correct about the SNMP protocol?

The IPv6 address 2001: ABEF:2240E:FFE2:BCC0:CD0:DDBE:8D58 cannot be abbreviated.

Which state does the OSPF protocol use to indicate that the adjacency relationship has been established?

The tracert diagnostic tool in Huawei routers is used to track the data forwarding path.

There are multiple route entries to the same destination network in the routing table. These routes are called?

The broadcast address is a special address that all the host bits in the network address are set to, and it can also be used as a host address.

Which of the following OSCPF protocol packets ensure the reliability of LSA update?

The last option field (option) of IPv4 is variable-length optional information. What is the maximum length of this field?

Which of the following advantages does the single-arm routing approach achieve inter-VLAN routing and intercommunication?

The switch receives a unicast data frame. If the destination MAC of the data frame can be found in the MAC table, the data frame will be forwarded from the corresponding port of this MAC.

The output information of the link aggregation port of a certain switch is as follows. If you want to delete Eth-Trunk1, which of the following commands is correct?

Which information of the data frame is used by the VLANIF interface to determine whether to perform Layer 2 or Layer 3 forwarding?

If the value of the ypeLength field of an Ethernet data frame is 0x0800, the length of the upper layer message header carried by this data frame is in the range of 20-60B.

When using FTP for file transfer, how many TCP connections will be established?

In order to join the wireless network STA. The wireless network information needs to be obtained first. Which of the following messages is used by the STA to actively obtain the SSID information?

In a broad sense, the transmission medium that constitutes the wireless local area network wlan does not include?

Which field of the ipv6 packet header can be used for QoS?

After the network administrator uses the TracertRoute function on the router device, in the data packet sent by the router, the value of the Protoco1 field in the IPv4 header is?

The switch is connected to the host. What is the common port link type of the switch?

When using the FTP protocol to upgrade the router software, the transmission mode should be selected

The network structure and OSPF partition are shown in the figure. In the figure, except for RTA., the routers RTB.RTC. and RTD. are ABR routers.

(RTA) ip route-statiC.10.1.1.02412.1.1.1 permanent

(RTA) ip route-statiC.10.2.2.02413.1.1.1.

The network administrator hopes to be able to effectively use the P address of the 192.168.176.0 network segment. Now that the companys marketing department has 20 hosts, which of the following address segments is best allocated to the marketing department?

What is the main function of the dynamic routing protocol?

The device port running the STP protocol is in the Forwarding state. Which of the following statements are correct?

The following description about the specified port of the spanning tree is correct

Which of the following statements about link aggregation are correct?

What is the total length of the VLAN frame format defined by IEEE802.1Q?

CSS refers to the combination of two switch devices that support cluster features. Logically combined into one switch device.

Which of the following statements about single-arm routing are correct?

The election of the root switch in STP only compares the priority of the switch, while in RSTP, the priority of the switch and the MAC address are compared at the same time.

The host uses the IP address 192.168.1.2 to access the Internet - it must go through NAT.

In the wLAN network architecture, terminal devices that support the 802.11 standard are called?

STA. Before associating to AP, it needs to obtain SSID through some message exchange. What are these messages?

Which of the following statements about MPLS Label labels is wrong?

The Management Information Base (MIB) (Management Information Base) is a virtual database that only exists on the NMS.

In the VRP interface, use the command startup saved-configuration backup.cfg. Configure the startup.cfg file to be used at the next startup.

Both pwD. and dir commands in the VRP operating platform can view the file information in the current directory.

The OSI reference model from high-level to bottom-level is

A company applies for a C. address segment, which needs to be evenly distributed to 8 subsidiaries. The largest subsidiary has 14 computers. Different subsidiaries must be in different network segments. The subnet mask should be designed as