What occurs if a network layer protocol is aware that a packet is larger than the maximum size for its network

Idon understand these and need some ! ?

Whats are the different parts of no verbal comunication, especially body language?

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most? a)give the file a unique name b)name the file in yymmdd format c)use descriptive name while naming the files d)use capital letters while naming the file