Networking Quiz 4

A remote computer is the system you control or work with over a network connection from another location. This could be through Remote Desktop Protocol (RDP), SSH, VNC, or similar remote access technologies. The computer you're physically using is the local computer.

It is poor practice to run all network services on a single server. This creates a single point of failure, reduces performance due to resource contention, and increases security risks. Best practice is to distribute services across multiple servers based on workload and security requirements.

HTTP (HyperText Transfer Protocol) is indeed the primary protocol used for viewing web pages. It defines how messages are formatted and transmitted between web browsers and web servers. While HTTPS (secure HTTP) is now standard for security, the base protocol remains HTTP.

A Local Area Network (LAN) connects computers and devices within a limited geographical area, such as a single room, office building, or home. In contrast, a WAN or global network spans large physical distances. LANs provide high data-transfer rates over small spaces.

Encryption and decryption primarily occur at the Presentation layer (Layer 6) of the OSI model. This layer is responsible for translation, encryption, and compression of data to ensure it's in a format the application layer can use. Note: Some modern encryption also happens at the Application layer (SSL/TLS).

SMTP (Simple Mail Transfer Protocol) is the standard protocol for sending email messages between servers. While the question is imprecise (email also uses POP3/IMAP for receiving), SMTP is the correct answer among the choices as it's the primary email protocol listed.

Port 25 is the default port for SMTP (Simple Mail Transfer Protocol). This standard port is used for sending email between mail servers. Note: Port 587 is now commonly used for client submission with authentication, but 25 remains the traditional SMTP port.

Port 21 is the default port for FTP (File Transfer Protocol) control connections. This port is used for establishing FTP sessions and sending commands. Port 20 is used for data transfer in active mode, but 21 is the primary control port.

Port 80 is the default port for HTTP web traffic on servers like IIS and Apache. When you type a URL without specifying a port, the browser defaults to port 80 for unencrypted HTTP. Port 443 is used for HTTPS, and 8080 is a common alternate web server port.

The Application layer (Layer 7) provides network services directly to user applications and end-user processes. It supports file transfer protocols like FTP and network management protocols like SNMP. Lower layers handle data transport, not application-level services.