Questions and Answers
Which of the following is a valid IP address?
Which of the following IP addresses are Class C addresses?
Which of the following IP addresses belong to the Class A network 114.0.0.0?
Which of the following IP addresses have a default subnet mask of 255.255.0.0?
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Which IP address range is reserved for Automatic Private IP Addressing?
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What is considered the loopback address for a computer?
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Which network protocol must be installed to browse the web?
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Which protocols are used to transmit Web pages from servers to browsers?
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Which IP protocol should you implement for user authentication on file downloads?
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What protocol is used to send e-mail messages from a mail client to a server?
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Which protocol is used for name resolution on Linux workstations?
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Which protocol do e-mail clients use to download messages from a remote server?
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Which port must be opened for DNS service on a Windows server?
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What is the default port for Secure Shell (SSH)?
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What is the default port for Apple Filing Protocol (AFP)?
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What is the default port for HTTPS over SSL?
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What is the default port for Hypertext Transfer Protocol (HTTP)?
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What is the default port for Server Message Block (SMB/CIFS) over TCP?
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What is the default port for Internet Message Access Protocol (IMAP)?
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List the default ports that match with the following protocols.
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Study Notes
IP Addressing
- A valid IPv4 address consists of four octets (8-bit numbers), ranging from 0 to 255, separated by periods (e.g., 172.16.1.26).
- Class C addresses start with a first octet between 192 and 223 (Examples: 192.15.5.55, 222.55.0.0, 223.16.5.0).
- Class A networks have the first octet ranging from 1 to 126 (e.g., 114.0.0.0 includes 114.58.12.0, 114.0.0.15, 114.122.66.12).
- Class B networks have a default subnet mask of 255.255.0.0 with first octets from 128 to 191 (Examples: 191.168.2.15, 168.16.5.1, 129.0.0.1).
- Automatic Private IP Addressing (APIPA) uses the range 169.254.0.1 to 169.254.255.254.
Networking Concepts
- The loopback address for hosts is 127.0.0.1; it tests internal TCP/IP configuration regardless of assigned IP.
- To access the Internet, IP protocol must be installed on a workstation.
- HTTP and HTTPS are used to transmit web pages; HTTP functions on port 80, while HTTPS operates over port 443.
Protocols Overview
- File Transfer Protocol (FTP) allows file transfers and supports user authentication.
- Simple Mail Transfer Protocol (SMTP) is used for sending emails from clients to servers.
- Internet Message Access Protocol (IMAP) and Post Office Protocol (POP3) are used for retrieving emails from mail servers.
- Domain Name System (DNS) is crucial for name resolution on networks, typically running on port 53.
Ports and Their Protocols
- Port 22: Secure Shell (SSH) for secure remote access.
- Port 80: HyperText Transfer Protocol (HTTP) for web traffic.
- Port 443: HTTP over SSL for secure web traffic.
- Port 445: Server Message Block (SMB/CIFS) for sharing files and printers.
- Port 143: Internet Message Access Protocol (IMAP) for email retrieval.
- Port 427: Service Location Protocol (SLP) for service discovery.
- Port 548: Apple Filing Protocol (AFP) for file-sharing on macOS.
Comparison of Security Protocols
- Secure Shell (SSH) (Port 22) serves for secure console access.
- SSL secures HTTP connections, transforming it into HTTPS for secure browsing.
Email Retrieval and Management
- POP3 (Post Office Protocol version 3) is utilized by email clients to download messages from a remote mail server.
- SMTP is specifically designated for sending emails, while IMAP allows for synchronization across multiple devices.
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Description
Test your knowledge on IP addressing and essential networking concepts, including Class A, B, and C addresses. This quiz covers the basics of IPv4 addresses, loopback addresses, and internet protocols like HTTP and FTP. Perfect for networking enthusiasts and students alike!
