A.by encrypting all passwords passing through the router
B.by encrypting passwords in the plain text configuration file
C.by requiring entry of encrypted passwords for access to the device
D.by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
E.by automatically suggesting encrypted passwords for use in configuring the router

A.The number of FECN packets that are received by the router
B.The number of BECN packets that are received by the router
C.The ip address of the local router
D.The value of the local DLCI
E.The status of the PVC that is configured on the router

A.沖突域的數量會減少。
B.沖突域的數量將增加。
C.廣播域的數量將保持不變。
D.沖突域的數量將保持不變。
E.廣播域的數量將增加。

A.if a switch that is configured to operate in client mode cannot access a VTP server,then the switch reverts to transparent mode.
B.The local vlan configuration is updated only when an update that has a higher configuration revision number is received.
C.Vtp advertisements are not forwarded to neighboring switches that are configured in vtp transparent mode.
D.When switches in vtp client mode are rebooted,they send a vtp advertisement request to the vtp servers.
E.Vtp client is the default vtp mode
F.On switches that are configured to operate in client mode ,vlans can be created,deleted,or renamed locally

A.With a network wide mask of 255.255.255.128， each interface does not require an IP address.
B.With a network wide mask of 255.255.255.128， each interface does require an IP address on a unique IP subnet.
C.With a network wide mask of 255.255.255.0， must be a Layer 2 device for the PCs to communicate with each other.
D.With a network wide mask of 255.255.255.0， must be a Layer 3 device for the PCs to communicate with each other.
E.With a network wide mask of 255.255.254.0， each interface does not require an IP address.