J276 1.5 Wired & Wireless Networks

Which of the following are layers in the TCP/IP Model?

• Network Access

• Ethernet

• Application

• TCP

• Transport

Which Protocol uses CSMA/CA

• HTTP

• Wi-Fi

• TCP

• IP

• Ethernet

Why in modern wired networks do we not tend to see CSMA/CD used?

• The use of a switch means that it controls the flow of traffic instead of forcing a computer to listen for a signal

• This statement is not true. The devices asks permission from the switch before sending any data

• The switch uses an IP address to route traffic, therefore the device doesn't need CSMA/CD to route traffic

• CSMA/CD was replaced by CSMA/CA and the older protocol is no longer needed

What is the transport layer responsible for?

• Controlling the flow of traffic across a network

• Providing an address to get a packet through a network

• Providing end to end reliable delivery

• Ensuring that the packet is placed onto a wired network

in the 3 way handshake, when establishing a connection, which flags are set to 1 in the TCP header?

• ACK

• FIN

• PSH

• URG

• SYN

Which protocol would be used to send an E-Mail?

• SMTP

• POP

• IMAP

• HTTP

• FTP

What field is common to both the Wi-Fi and Ethernet Headers?

• Source MAC Address

• Destination IP Address

• Port Number

• CRC

What is a CRC used for?

• To check how much data there is

• To make sure that the IP address is correct

• To check that the data in the packets is authentic

• To tell the device that the packet has finished sending

What is the Internet Layer responsible for?

• Ensuring that there is an address

• Ensuring end to end reliable delivery

• Ensuring that the Packet has not been tampered with

• Telling a device what application to use

Why do we use the TCP/IP model?

• To make it easy to remember the protocols

• It allows for companies to standardize equipment and software

• Without it we couldn't use the Internet

• It tells a device, such as a router, what it needs to do