1、设备的远程管理线路是哪个？
vty线路
2、vty线路和console线路有什么不同？
vty线路可以同时允许多个用户登录，二console允许一个用户同时访问
3、远程管理的方式有哪些？
Telnet协议和SSH协议
4、Telnet和SSH有何不同？
Telnet是明文协议，所有的数据都是以明文的方式发送的，不安全
SSH是密文协议，数据经过加密后再发送，安全性更高
使用telnet远程登录设备
[R1]interface GigabitEthernet 0/0/0 [R1-GigabitEthernet0/0/0]ip add [R1-GigabitEthernet0/0/0]ip address 12.1.1.1 24 Oct 22 2018 14:04:39-08:00 R1 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state. [R1-GigabitEthernet0/0/0]quit [R1]disp [R1]display ip ? accounting <Group> accounting command group as-path-filter Specify regular expression access list number community-filter Add a community-filter entry extcommunity-filter Match BGP/VPN extended community filter ha Display information of socket HA host Host table(s) interface Show information of interfaces ip-prefix Specify an address prefix-list ipv6-prefix Specify an IPv6 address prefix-list netstream <Group> netstream command group policy-based-route Display policy based routing information pool <Group> pool command group prefix-limit Prefix limit rd-filter Route-distinguisher filter routing-table Routing table socket <Group> socket command group source Source statistics Display statistics information of datagram vpn-instance <Group> vpn-instance command group [R1]display ip int [R1]display ip interface ? Cellular Cellular interface GigabitEthernet GigabitEthernet interface NULL NULL interface brief Brief summary of IP status and configuration description Interface description | Matching output <cr> Please press ENTER to execute command [R1]display ip interface br [R1]display ip interface brief *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 2 The number of interface that is DOWN in Physical is 2 The number of interface that is UP in Protocol is 2 The number of interface that is DOWN in Protocol is 2 Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 12.1.1.1/24 up up GigabitEthernet0/0/1 unassigned down down GigabitEthernet0/0/2 unassigned down down NULL0 unassigned up up(s) [R1]SYS [R1]sysname R2 [R2]us [R2]user-int [R2]user-interface ? INTEGER<0,129-149> The first user terminal interface to be configured console Primary user terminal interface current The current user terminal interface maximum-vty The maximum number of VTY users, the default value is 5 tty The asynchronous serial user terminal interface vty The virtual user terminal interface [R2]user-interface vt [R2]user-interface vty 0 4 [R2-ui-vty0-4]au [R2-ui-vty0-4]authentication-mode aaa [R2-ui-vty0-4]quit [R2]lo [R2]loc [R2]sys [R2]aaa [R2-aaa]loc [R2-aaa]local-user user-r1 pa [R2-aaa]local-user user-r1 password cip [R2-aaa]local-user user-r1 password cipher huawei123 Info: Add a new user. [R2-aaa]loc [R2-aaa]local-user us [R2-aaa]local-user user-r1 pr [R2-aaa]local-user user-r1 privilege le [R2-aaa]local-user user-r1 privilege level 2 [R2-aaa]loc [R2-aaa]local-user us [R2-aaa]local-user user-r1 ser [R2-aaa]local-user user-r1 service-type te [R2-aaa]local-user user-r1 service-type telnet [R2-aaa]quit [R2]quit <R2> <R2>quit Configuration console exit, please press any key to log on
<R1>telnet 12.1.1.1 Press CTRL_] to quit telnet mode Trying 12.1.1.1 ... Connected to 12.1.1.1 ... Login authentication Username:user-r1 Password: