Repeat part (a) using X as the first splitting attribute and then choose the best remaining attribute for splitting at each of the two successor nodes. What is the error rate of the induced tree?
Consider the following set of training examples.
After choosing attribute X to be the first splitting attribute, the sub-
sequent test condition may involve either attribute Y or attribute Z.
For X = 0, the corresponding counts for attributes Y and Z are shown
in the table below.
The error rate using attributes Y and Z are 10/120 and 30/120, re-
spectively. Since attribute Y leads to a smaller error rate, it provides a
better split.
For X = 1, the corresponding counts for attributes Y and Z are shown
in the tables below.
The error rate using attributes Y and Z are 10/80 and 30/80, respec-
tively. Since attribute Y leads to a smaller error rate, it provides a
better split.
The corresponding two-level decision tree is shown below.
 with correct word
A network engineer for a company has issued the 10.44.210.0/24 network for a branch office. The network administrator for the branch has three separate VLANs for voice, workstations, and servers. There are approximately 50 end user workstations, 50 IP phones that require addressing, and a dozen servers. How should the network administrator use the block allocated to the branch?
A. Subnet the block into /26s and assign one to each VLAN.b B. Do not subnet the block?use the /24 for all VLANs. C. The administrator must request more networks and use the networks given so far for the servers and workstation VLANs. D. Subnet the block into /25s and assign one to each voice and workstation VLANs