15: Networking Concepts
What does HTTP stand for?
HyperText Transfer Protocol (HTTP).
What protocol is usually used to provide logical addressing on networks?
Internet Protocol (IP).
What are the key features of a packet switching network?
Nodes within the network can perform a forwarding function, allowing a packet to utilize any available path through the network. This makes the network robust against link failures. If is beneficial for the network to use small packets that are easy to re-send.
Which protocol allows people to use names/labels to address network resources rather than numeric addresses?
Domain Name System (DNS).
What type of address identifies a network interface in the context of the local network segment only?
A Media Access Control (MAC) address.
What is a WAN?
A Wide Area Network (WAN) connects sites in different geographic locations
What is a packet made up of?
A packet consists of a number of fields contained within a header section plus a payload. The payload could be a packet from the protocol layer above.
What type of device is used to transfer packets between different networks?
A router.
Which email protocol(s) are used to download messages from a mail server?
Either Post Office Protocol (POP) or Internet Message Access Protocol (IMAP).
Which of the following parts of a web address is usually depends on a name resolution service: protocol type, host location, file path?
The host location is usually represented by a Fully Qualified Domain Name (FQDN), such as www.comptia.org, resolved to a numeric IP address by DNS.