In an 802.11 data frame, what is the size of the frame check sequence field?
a. 2 bytes
b. 4 bytes
c. 6 bytes
d. 8 bytes
ANSWER: c
You might also like to view...
Documents written in SGML must be used on devices running the Unix operating system.
Answer the following statement true (T) or false (F)
The _______ extension has the added security advantage of allowing only a single query to execute with certain methods.
a. httpd b. mysqld c. mysqli d. myPHPadmin
People skills are a valuable asset in any IT field
Indicate whether the statement is true or false
Consider a schema S with functional dependencies:
{A->BC, C->FG, E->HG, G->A}. (a) Compute the attribute closure of A with respect to S. (b) Suppose we decompose S so that one of the subrelations, say called R, contains attributes AFE only. Find a projection of the functional dependencies in S on R (i.e., find the functional dependencies between attributes AFE). (c) Is R in BCNF? Explain. If not, use one cycle of the BCNF decomposition algorithm to obtain two sub relations, and answer whether they are in BCNF. (d) Show that your decomposition is lossless. (e) Is your decomposition dependency preserving? Explain. (f) Is R in 3NF? Explain. If not, use 3NF decomposition algorithm to obtain sub relations, and answer whether they are in 3NF.