A.it is a layer 2 messaging protocol which maintains vlan configurations across network.
B.it includes an 8-bit field which specifies the priority of a frame.
C.it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.
D.it modifies the 802.3 frame header，and thus requires that the FCS be recomputed.
E.it is a trunking protocol capable of carring untagged frames.

A.255.255.255.0
B.255.255.255.192
C.255.255.255.250
D.255.255.255.252

A.RSTP cannot operate with PVST+.
B.RSTP defines new port roles.
C.RSTP defines no new port states.
D.RSTP is a proprietary implementation of IEEE 802.1D STP.
E.RSTP is compatible with the original IEEE 802.1D STP.

A.redundant
B.spanned
C.provisioned
D.converged

A.Executing password recovery is required.
B.The virtual terminal lines are misconfigured.
C.Use Telnet to connect to RouterA and then to NewSwitch to correct the error.
D.Power cycle of NewSwitch will return it to a default configuration.

A.PPP
B.FDDI
C.Frame Relay PVC
D.NBMA
E.Frame Relay SVC

A.On router R2, configure a default static route to the 192.168.1.0 network.
B.On router R2, configure DNS to resolve the URL assigned to Web Server 2 to the 192.168.1.10 address.
C.On router R1, configure NAT to translate an address on the 209.165.100.0/24 network to 192.168.1.10.
D.On router R1, configure DHCP to assign a registered IP address on the 209.165.100.0/24 network to Web Server 2.

A.SSID
B.RTS/CTS
C.AES-CCMP
D.TKIP/MIC
E.RF channel
F.authentication method

A.NCP
B.LCP
C.ISDN
D.DLCI
E.SLIP

A.There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast.
B.A single interface may be assigned multiple IPv6 addresses of any type.
C.Every IPv6 interface contains at least one loopback address.
D.The first 64 bits represent the dynamically created interface ID.
E.Leading zeros in an IPv6 16 bit hexadecimal field are mandatory.