本人剛報讀了有關 LAN Technologies 的課程，但本人很愚笨，老是不太明白老師在說什麼，後天還要交功課，但完全不懂做，請問有沒有師兄/師姐可教教本人。

問題1.
Assume you are a network design engineer. Given that Host A and B are in the Engineering Department while host C with a printer are in the Administration Department. Without considering the MAC address table information, suggest and explain how many VLAN(s) and types of VLAN are required for the network shown in Figure 2 By assigning the devices(i.e. PC, IP Phone, printer and switch) with VLAN number.

問題2.
Refer to Figure 2, write the commands to configure the VoIP phone to voice VLAN 30, and the Host C & printer to VLAN 20 in switch S1. Assume your start the configuration with the prompt S1(config)# and we use normal range VLAN. It is noted that VLANs 20 and 30 have been configured in switch S1.

問題3.
How S1 differentitaes the data frame sent from the VoIP phone and Host C?

問題4.
請問有沒有中文參考書或網站可推介給本人，讓本人更容易學習。