多项选择题
Which two fields are found in an Ethernet frame header?（）
A. TTL B. flags C. checksum D. type
多项选择题 Which two statements are correct about Layer 2 broadcast frames?（）
多项选择题 Which two statements accurately describe a broadcast domain?（）
单项选择题 What information is used by a switch to forward an Ethernet frame to its destination?（）
