多项选择题

Which two of these statements regarding RSTP are correct?（）

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.

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多项选择题

What are three basic parameters to configure on a wireless access point?（）

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

多项选择题

Which two of these statements are true of IPv6 address representation?（）

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.