Regarding the LSA of all kinds of message, which of the following description is wrong?
A . DD type LSA only contains the summary information of LSA, that is, it contains LS TYPE, LSID, ADVERTISING ROUTER and LS SEQUENCE NUMBER
B . LS REQUEST message only has LS TYPE, LS ID and ADVERTISING ROUTER
C . LS UPDATE packet contains complete LSA information
D . LS ACK packet contains complete LSA information
Answer: D