Network Protocols I: The TCP/IP Model and IPv4 Addressing

Which functions belong to OSI Layer 6, the Presentation layer?

In the IP header's Protocol field, which value identifies TCP?

What is the Protocol Data Unit (PDU) at the Network layer called?

Which IP header field is decremented by each router and prevents routing loops?

Which well-known port number is assigned to DNS?

A socket uniquely identifies an application endpoint. What is a socket?

Which of the following is a private address range defined by RFC 1918?

You need 4 subnets from 192.168.10.0/24. How many host bits must you borrow, and what is the new prefix?

How many usable hosts does a /26 subnet provide?

What destination MAC address does an ARP Request use?

In the TCP/IP model, presentation functions are handled within the application layer.

UDP is connection-oriented and provides reliable, ordered delivery.

A switch operates at Layer 2 and forwards frames based on the destination MAC address.

Encapsulation adds headers top-down, and de-encapsulation removes them bottom-up.

An APIPA address from 169.254.0.0/16 is assigned automatically when DHCP fails.

The network address and the broadcast address of a subnet can both be assigned to hosts.

A MAC address has a hierarchical network/host structure, just like an IP address.

When the destination is on a remote network, ARP resolves the default gateway's MAC address rather than the remote host's.

ICMP is used to transfer application data between hosts.

The IP Header Checksum covers the header only and is recalculated at every hop.

Match each OSI layer with an example protocol or mechanism.

Match each layer with the name of its Protocol Data Unit.

Match each IPv4 header field with its purpose.

Match each well-known port number with its service.

Match each ICMP type number with its message.