Which two are valid fields in an IPv6 header?()
A、Hop Limit
B、Next Header
C、Fragment Offset
D、Header Checksum
A、Hop Limit
B、Next Header
C、Fragment Offset
D、Header Checksum
A、A.Foo.beta() is a valid invocation of beta(). B、B.Foo.alpha() is a valid invocation of alpha(). C、C.Method beta() can directly call method alpha(). D、D.Method alpha() can directly call method beta().
A、A.p0 = p1; B、B.p1 = p2; C、C.p2 = p4; D、D.p2 = (ClassC)p1; E、E.p1 = (ClassB)p3; F、F.p2 = (ClassC)p4;