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中级工程师
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发表于 2011-8-14 23:55:28
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这题以前群内有人发过.还有几题新选择题记得不太清楚了.拖图题关于VLAN的换了一种表述有二题.
4 T7 w) d) Z4 ^% Z! q( M* YRefer to the exhibit.DHCP snooping is enabled for selected VLANs to provide security on the network.How do the switch ports handle the DHCP messages?3 A- H5 a7 Z: y
A.A DHCP OFFER packet from a DHCP server received on ports Fa2/1 and Fa2/2 is dropped
4 `6 r, |- Y% r2 Q! O, Z/ ZB.A DHCP packet received on ports Fa2/1 and Fa2/2 is dropped if the source MAC address and the DHCP client hardware address dose not match snooping database/ x; w& P; M! V
C.A DHCP packet received on ports Fa2/1 and Fa2/2 is forwarded without being tested.* c6 S- d; q( J; R' l2 P$ c
D.A DHCPELEASE message received on ports Fa2/1 and Fa 2/2 has a MAC address in the DHCP snooping binding database,but the interface information in the binding database dose not match the interface on which the message was received and is dropped.
d! c+ y H9 H |
9#
2011-8-14 23:55:28
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