The following statement about the upgrade of H3C network equipment is correct ______. (Multiple choice)

• A.Use Xmodem to upgrade to the same speed as FTP
• B.When the device cannot boot to the command line mode and needs to upgrade the operating system software, Xmodem and TFTP can be used
• C.In an environment where the complex interaction between the client and the server is not convenient, you can use TFTP to upgrade
• D.When using FTP to upgrade, the device can be used as an FTP server or client

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On the MSR router, you can use the ______ command to clear the NAT session table entries.

• A.reset nat session
• B.reset nat table
• C.clear nat session
• D.clear nat

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When viewing the configuration, if there are many configuration commands and one screen cannot be displayed completely, after displaying one screen, you can press ___ to display the next page.

• A.<Enter> key
• B.<Ctrl+p> key
• C.<Space> key
• D.<Ctrl+c> key

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There are many kinds of WAN interfaces. The following description of the WAN interface is wrong.

• A.The V.24 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation.
• B.The G.703 interface provides high-speed data synchronous communication services.
• C.BRI/PRI interface is used for ISDN access, the default link encapsulation is PPP
• D.The V.35 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation.

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The three MSR routers are connected as shown in the figure.

All three routers belong to OSPF Area 0, and at the same time, the interconnection network segments of the three routers are advertised in Area 0 through the network command. On RTC, the network segment NET-1 is also published in OSPF Area 0 through the network command. The OSPF Cost between the three routers is shown in the figure.
At present, the neighbor status of the three routers is stable, so ______. (Multiple choice)

• A.After the network status is stable, within the next 45 minutes, only Hello packets will be transmitted between OSPF neighbors on the network
• B.There is only one OSPF route to the NET-1 network segment in the RTA routing table
• C.There are two OSPF routes to the destination network segment NET-1 in the RTB routing table
• D.For RTB, to reach the destination network segment NET-1 will give priority to RTB--->RTC path

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