CompTIA Unit 2.1-2.3 Port Numbers and Network Services

Practice flashcards covering CompTIA network protocols, port numbers, server types, and security appliances as detailed in Units 2.1-2.3.

What is the function of Port Numbers at Layer 4?

They are assigned to the source and destination to uniquely identify the communication and are important for firewall rules.

Which protocol is used for moving files and folders over a network and uses TCP $20/21$?

FTP (File Transfer Protocol).

What is SSH (Secure Shell) and which port does it use?

It is an encrypted communication link that uses TCP/$22$ and looks and acts the same as telnet.

What are the characteristics of Telnet?

It uses TCP $23$, allows remote login to devices, does not support SSH, and uses "in the clear" communication.

What is the primary function of SMTP (Simple Mail Transfer Protocol)?

It is a communications protocol that enables sending email from a client to a server or between servers.

According to the transcript, what is the layer and port for Domain Name System (DNS)?

It converts names to IP addresses using UDP/$S3$.

What are the features of DHCP (Dynamic Host Configuration Protocol)?

It provides automated configuration of IP addresses and subnet masks using UDP/$67$ and UDP/$68$, requiring a DHCP server for dynamic or pooled assignments.

How is a DHCP reservation managed?

Addresses are assigned by MAC address in the DHCP server to manage addresses from one location.

What are the ports for POP3 and IMAPv4?

POP3 uses TCP/$110$ and IMAPv4 uses TCP/$143$.

What is SMB (Server Message Block) also known as?

Common Internet Filing System.

What is the difference between LDAP and LDAPS in terms of ports?

LDAP uses TCP/$389$ for network directory information, while LDAPS (LDAP Secure) uses TCP/$636$ over SSL.

What port is used by RDP (Remote Desktop Protocol)?

TCP $3389$.

Which protocols are used for file management systems on Windows and Mac?

Windows uses SMB (Server Message Block) and Mac uses AFP (Apple Filing Protocol).

What protocols are typically used by a Print Server to connect a printer to the network?

SMB, IPP, and LPD.

What is Syslog used for?

It is a standard for message logging that consolidates logs from diverse systems into a central receiver, often integrated into a SIEM.

What language is used for relational database table storage on a Database server?

SQL (Structured Query Language).

What is the purpose of an NTP server?

Network Time Protocol is used to keep all computers on a network synchronized in time.

What components are included in an AIO (All-In-One) security appliance?

URL filter, spam filter, csu/dsu, firewall, bandwidth shaper, and vpn endpoint.

What scheduling methods are used by a Load Balancer?

Source address IP affinity and round-robin.

What is the primary use of SCADA / ICS (Supervisory Control and Data Acquisition / Industrial Control System)?

It is used primarily in the energy, oil, and gas industries for PC management of equipment.

How are Embedded systems defined?

Purpose-built devices, such as alarm systems or door security, where it is not usual to have direct access to the operating system.

What does IoT (Internet of Things) refer to?

The network of physical devices with IP addresses connected to the Internet, such as wearable technology and home automation.