answer all of the above urgently

In the packet switching model, packets may experience random queuing delays at the intermediate routers. QUESTION 11 In the packet switching model, packets may suffer from out-of-order arrivals. QUESTION 12 A typical architecture of an institutional LAN comprises a hierarchy of access switches and switches. QUESTION 13 In the TCP/IP model, NL uses a address to identify a node in a LAN. Your answer must be an acronym. QUESTION 14 A protocol that uses a 100-byte header when the total PDU size is 1000 bytes, has an efficiency of \%. Report your answer as a percentage rounded to the nearest integer