Networking Protocols Quiz

Which statement best defines a networking protocol?

• A physical cable type

• A set of rules that standardize communication between systems

• A software update package

• A cloud storage service

Why do multiple protocols often coexist in a network?

• To replace each other constantly

• To work at different layers and complement functions

• To make troubleshooting harder

• To avoid headers

In a layered model, each layer communicates directly with:

• All layers

• Only the layer above and below

• Only hardware

• Only the user

What enforces strict boundaries between adjacent layers?

• VLAN table

• Interface/Service access points

• Firewall rules

• File permissions

Which three layers are “occupied” by TCP/IP suite?

• Physical, Data Link, Network

• Application, Transport, Network (Internet)

• Data Link, Transport, Application

• Physical, Network, Application

Which layer picks routes across interconnected networks?

• Application

• Transport

• Network (IP)

• Data Link

TCP is “connection-oriented” because it:

• Never uses headers

• Establishes a logical connection and awaits ACKs

• Only sends one big packet

• Works at the physical layer

Which two header fields help deliver data to the correct app and in order?

• Port number and sequence number

• VLAN and TTL

• MAC and FCS

• Window size and CRC

IP is called “connectionless” because it:

• Confirms delivery to apps

• Keeps state per flow

• Does not confirm delivery nor track content

• Works only on LANs

Where are source and destination IP addresses added?

• Transport header

• IP header

• Ethernet trailer

• Application payload