Network Ops Flashcards
Terms and definitions
Address Resolution Protocol (ARP)
A network protocol used to determine the MAC address of the next router or device on the path
PortNo: 219 TCP/UDP
Cloud-based firewalls:
Software firewalls that are hosted by the cloud service provider
Encapsulation:
A process performed by a VPN service that protects your data by wrapping sensitive data in other data packets
Domain Name System (DNS)
A networking protocol that translates internet domain names into IP addresses PortNo. 53 TCP/UDP
Firewall:
A network security device that monitors traffic to or from your network
Controlled zone:
A subnet that protects the internal network from the uncontrolled zone
Forward proxy server:
A server that regulates and restricts a person’s access to the internet
Hypertext Transfer Protocol (HTTP):
An application layer protocol that provides a method of communication between clients and website servers
PortNo. 80
Hypertext Transfer Protocol Secure (HTTPS)
A network protocol that provides a secure method of communication between clients and servers
PortNo: 443
Network protocols:
A set of rules used by two or more devices on a network to describe the order of delivery of data and the structure of data
IEEE 802.11 (Wi-Fi):
A set of standards that define communication for wireless LANs
Network segmentation:
A security technique that divides the network into segments
Port filtering:
A firewall function that blocks or allows certain port numbers to limit unwanted communication
Proxy server:
A server that fulfills the requests of its clients by forwarding them to other servers
Reverse proxy server:
A server that regulates and restricts the internet’s access to an internal server
Secure File Transfer Protocol (SFTP)
A secure protocol used to transfer files from one device to another over a network
PortNo: 22
Secure shell (SSH)
A security protocol used to create a shell with a remote system
PortNo: 22
Security zone:
A segment of a company’s network that protects the internal network from the internet
Simple Network Management Protocol (SNMP)
A network protocol used for monitoring and managing devices on a network
PortNo: 161&162
Stateless:
A class of firewall that operates based on predefined rules and does not keep track of information from data packets
Stateful:
A class of firewall that keeps track of information passing through it and proactively filters out threats
Subnetting:
The subdivision of a network into logical groups called subnets
Transmission Control Protocol (TCP)
An internet communication protocol that allows two devices to form a connection and stream data
Uncontrolled zone:
he portion of the network outside the organization
Virtual private network (VPN):
A network security service that changes your public IP address and masks your virtual location so that you can keep your data private when you are using a public network like the internet
Wi-Fi Protected Access (WPA):
A wireless security protocol for devices to connect to the internet
