GB0-191-ENU 実際試験問題と解答 - 模擬練習 - 受験自信を増やす

Question No : 1
The correct description of the startup process of the router system in the following options is ______ .

A.memory test ------ start bootrom ------ application decompression ------- application loads
B.Start bootrom ------ memory test ------ application loads
C.Application decompression ------ application loads ------ startup bootrom ------ memory test
D.memory test ------ application decompression ------ Application Loader

正解:
Explanation:
Router system startup: memory detection> bootrom > application decompression> application loading

Question No : 2
The following statement about the upgrade of H3C network equipment is correct ______ . (Multiple choices)

A.Using Xmodem to upgrade can achieve the same speed as FTP
B.When using FTP to upgrade, the device can be used as an FTP server or client
C.When the device cannot be booted to the command line mode and the operating system software needs to be upgraded, Xmodem and TFTP modes can be used
D.In an environment where the client and server are not easy to interact with, you can use TFTP to upgrade

正解:
Explanation:
Xmodem upgrade speed snail

Question No : 3
The following statement about the upgrading of H3C network equipment is correct ______ . (Multiple choices)

A.Using Xmodem to upgrade can achieve the same speed as FTP
B.When using FTP to upgrade, the device can only be an FTP client
C.When the device cannot boot to the command line mode and the operating system software needs to be upgraded, only the Xmodem mode can be used
D.In an environment where the client and server are not easy to interact with, you can use TFTP to upgrade

正解:
Explanation:
The device can be used as a client or server
TFTP 69 Simple File Transfer Protocol
If you cannot enter the device, you can upgrade through ftp / tftp / Xmodem through the bootrom menu : when the device cannot boot to the command line mode and you need to upgrade the operating system software , use the operation function provided by the BOOTROM menu in the BOOTROM mode , using ftp / tftp enables the device to boot normally and boot into command line mode.
If the network connection between FTP and TFTP server and the device cannot be achieved , it is only adopted in the BOOTROM mode through the console port
Xmodem completes the upgrade and enables the device to boot normally to the command line mode

Question No : 4
If you need to configure the IP address of the Ethernet port on the MSR , it should be configured under ______ .

A.System view
B.User view
C.Interface view
D.Routing protocol view

正解:

Question No : 5
SSH uses TCP port number ______ by default .

A.20
B.21
C.22
D.23

正解:

Question No : 6
The following description about the characteristics of VTY in H3C equipment is correct ______ .

A.Only used to Telnet the device
B.Each device can support multiple VTY users to access simultaneously
C.Each VTY user corresponds to a physical interface
D.Does not support passwordless authentication

正解:
Explanation:
Vty is the virtual login interface, supports multiple users and supports authentication
Vty 0-4 5 interfaces, which can be accessed by 5 people at the same time
Logic lines 0-4 are randomly assigned. If 1-4 is turned off , only 0 is left , but it may not be randomly reached 0 , and it is still inaccessible

Question No : 7
By (console Console fresh from the factory without configuration) port configuration MSR routers, terminal serial port baud rate should be set to _____ .

A.9600
B.2400
C.115200
D.38400

正解:

Question No : 8
The following description of the characteristics of Comware , the correct one is ______ .

A.Support IPv4 and IPv6 dual protocol
B.Support multiple CPUs
C.Fusion of routing and switching functions
D.High reliability and flexible expansion
E.Flexible cutting and customization functions

正解:

Question No : 9
The following description of the characteristics of the router is correct ______ . (Multiple choices)

A.Is the network layer device
B.Route forwarding based on link layer information
C.Provide rich interface types
D.Can support multiple routing protocols

正解:
Explanation:
Work on the bottom three
Route forwarding based on network layer information
Rich interface types, can be used to connect networks of different media

Question No : 10
During the removal of the TCP connection as shown in the figure , the Y part of FIN should be filled with ______ .

A.p
B.q
C.p+1
D.q+1

正解:

Question No : 11
During the removal of the TCP connection as shown in the figure , the X part of the ACK should be filled with ______ .

A.p
B.q
C.p+1
D.q+1

正解:
Explanation:
X = p + 1 , B receives the connection termination request segment sent by A , confirms, and closes the connection at the same time

Question No : 12
During the establishment of the TCP connection as shown in the figure , the Y part of SYN should be filled in ________ .

A.a
B.b
C.a+1
D.b+1

正解:

Question No : 13
During the establishment of the TCP connection as shown in the figure , the X part of the SYN should be filled with ________ .

A.a
B.b
C.a+1
D.b+1

正解:
Explanation:
X = a + 1 (confirm receipt of a , expect to send a + 1 next time )
Y = a + 1
Z = b + 1 (Confirm receipt b )

Question No : 14
The common fields in the UDP and TCP protocol headers are ______ . (Multiple choices)

A.Source port
B.Destination port
C.Flow control
D.Source IP address
E.Checksum
F.Serial number

正解:

Question No : 15
The common fields of the UDP protocol and TCP protocol header are ______ . (Multiple choices)

A.Source IP address
B.Flow control
C.Checksum
D.Serial number
E.Destination port
F.Source port

正解:
Explanation:
UDP header: consists of source port, destination port, length, checksum
TCP header: source port, destination port, checksum, serial number, confirmation number, window, data is cheap, etc., to ensure the reliability of UDP protocol and TCP protocol header common fields: source port, destination port, calibration Checksum

H3C GB0-191-ENU 問題練習