A+ 1101 Networking Flashcards
Define FTP, it’s ports, and use
20/21 – File Transfer Protocol (FTP) - used for file transfers between devices
Define SSH, its port, and use
22 – Secure Shell (SSH) - used for secure remote access to a device
Define Telnet, its port, and use
23 – Telnet - used for remote access to a device
Define SMTP, its port, and use
25 – Simple Mail Transfer Protocol (SMTP) - used for email transmission
Define DNS, its port, and use
53 – Domain Name System (DNS) - used for translating domain names into IP addresses
Define DHCP, its ports, and use
67/68 – Dynamic Host Configuration Protocol (DHCP) - used for automatic IP address assignment
Define HTTP, its port, and use
80 – Hypertext Transfer Protocol (HTTP) - used for transmitting web pages and other web-related data
Define POP3, its port, and use
110 – Post Office Protocol 3 (POP3) - used for retrieving email from a server
Define NetBIOS, its port, and use
137/139 – Network Basic Input/Output System (NetBIOS)/NetBIOS over TCP/IP (NetBT) - used for communication between devices on a local network
Define IMAP, its port, and use
143 – Internet Mail Access Protocol (IMAP) - used for retrieving email from a server
Define SNMP, its port, and use
161/162 – Simple Network Management Protocol (SNMP) - used for monitoring and managing network devices
Define LDAP, its port, and use
389 – Lightweight Directory Access Protocol (LDAP) - used for accessing and modifying directory information
Define HTTPS, its port, and use
443 – Hypertext Transfer Protocol Secure (HTTPS) - used for secure web communication
Define SMB/CIFS, its port, and use
445 – Server Message Block (SMB)/Common Internet File System (CIFS) - used for file sharing and printer access
Define RDP, its port, and its use
3389 – Remote Desktop Protocol (RDP) - used for remote access to a device’s desktop environment
What’s the difference between TCP and UDP?
TCP is establishes a connection b/t two devices to transfer data.
UDP is connectionless, and does not establish ensure reliable data transfer.
What do Routers do?
Routes traffic between IP subnets
– Makes forwarding decisions based on IP address
– Routers inside of switches sometimes called
“layer 3 switches”
* Often connects diverse network types
– LAN, WAN, copper, fiber
Describe the uses of a Firewall.
Filters traffic by port number
– OSI layer 4 (TCP/UDP)
– Some firewalls can filter based on the application
* Can encrypt traffic into/out of the network
– Protect your traffic between sites
* Can proxy traffic
– A common security technique
What is a cable modem?
a device that connects a home network to the internet through a coaxial cable connection.
What is a DSL?
Digital Subscriber Line
– allows for high-speed internet access over existing telephone lines.
What is an ONT?
Optical Network Terminal
– Device used in fiber-optic networks to convert optical to electrical signals to be used by network devices
What is network does ONT provide?
Fiber network
What is a NIC?
Network Interface Card
What is SDN?
Software-defined networking
