An application layer protocol for email clients to retrieve email and attachments from an email server. By default, messages are not kept on the server after they have been accessed by the client.
IMAP
POP3
SMTP
A port number used by a client to indicate to the destination server what service is being requested.
destination port
default port
registered port
Ports in the range of 49152-65535 that can be used by any application
open ports
unregistered ports
public ports
private ports
Client software that is used to provide remote access to the console of a network device or a server, usually to the CLI.
serial port
console terminal
virtual terminal
❌ identify common network applications, in the range of 1-1023. ❌ are used by organizations to register specific applications, in the range of 1024-49151. ❌ are dynamically generated port numbers chosen by the sending device to identify a conversation between two devices.
The fixed length subnet mask for each classful IPv4 network is the .
The formal name of classless IPv4 addressing:
A is a packet sent to all hosts on a specific network who have the same subnet mask.
A is a packet sent with the destination address of 255.255.255.255.
is a term used to refer to interconnected networks under single administrative control.
The broad term used to describe any device that sends and receives messages across a network.
end device
host
client
A device that shares itself across a network, but needs a host to do so.
NIC
accessory
peripheral
Cell phone networks that are optimized for fast data transmission.
3G
4G
4G-LTE
LTE
Satellite
A network configuration that requires a user to assign an IP address to an end-user device.
static IP
manual IP
SLAAC
