A.Onl ypasswords configured afte rthe command has been entered will be encrypted.
B.Only the enable password will be encrypted.
C.Only the enable secret password will be encrypted
D.It will encrypt the secret password and remove the enable secret password from the configuration.
E.It will encrypt all current and future passwords.

A.用于檢查網(wǎng)管工作是否正常
B.用于檢查網(wǎng)絡(luò)連接是否可通
C.用于分析網(wǎng)絡(luò)在哪里出現(xiàn)了問題

A.It creates a VLAN 999 interface.
B.It designates VLAN 999 for untagged traffic.
C.It blocks VLAN 999 traffic from passing on the trunk.
D.It designates VLAN 999 as the default for all unknown tagged traffic.

A.在終端設(shè)備之間傳送比特流
B.建立、維護(hù)虛電路，進(jìn)行差錯(cuò)校驗(yàn)和流量控制
C.定義電壓、接口、線纜標(biāo)準(zhǔn)、傳輸距離等特性

A.190.0.0.0
B.190.233.0.0
C.190.233.27.0
D.190.233.27.1

A.網(wǎng)絡(luò)地址和主機(jī)地址
B.主機(jī)地址和網(wǎng)絡(luò)掩碼
C.網(wǎng)絡(luò)地址和網(wǎng)絡(luò)掩碼

A.ISO
B.ITU
C.IETF
D.IEEE

A.VLANs establish broadcast domains in switched networks.
B.VLANs utilize packet filtering to enhance network security.
C.VLANs provide a method of conserving IP addresses in large networks.
D.VLANs provide a low-latency internetworking alternative to routed networks.
E.VLANs allow access to network services based on department, not physical location.
F.VLANs can greatly simplify adding, moving, or changing hosts on the network.

A.RIP
B.BGP
C.OSPF
D.EIGRP

A.線纜，如光纖、雙絞線、同軸電纜等
B.集線器
C.MODEM
D.路由器