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Questions and Answers
The Telnet protocol encrypts transmitted data, which therefore cannot be read by others on the network.
The Telnet protocol encrypts transmitted data, which therefore cannot be read by others on the network.
False (B)
When using static IP addressing, software automatically configures the network connection on each device.
When using static IP addressing, software automatically configures the network connection on each device.
False (B)
A problem with virtual networks is that data transmitting through them cannot be encrypted and therefore is not secure.
A problem with virtual networks is that data transmitting through them cannot be encrypted and therefore is not secure.
False (B)
The User Datagram Protocol (UDP) guarantees delivery of data to its destination.
The User Datagram Protocol (UDP) guarantees delivery of data to its destination.
The current release of SMB is CIFS, also called SMB2.
The current release of SMB is CIFS, also called SMB2.
What is the name of the 32-bit or 128-bit number that is used to identify a device on a network?
What is the name of the 32-bit or 128-bit number that is used to identify a device on a network?
How are IP addresses available to the Internet classified?
How are IP addresses available to the Internet classified?
What type of IP address is configured by a server when a device first initiates a connection to the network?
What type of IP address is configured by a server when a device first initiates a connection to the network?
How is the network portion and the host portion of an IP address identified?
How is the network portion and the host portion of an IP address identified?
What command can be used to display IP addresses assigned to all network connections on a system?
What command can be used to display IP addresses assigned to all network connections on a system?
Packets are delivered to a single node on a network when using what type of IPv6 address?
Packets are delivered to a single node on a network when using what type of IPv6 address?
What protocol makes a connection, checks whether the data is received, and resends it if it is not?
What protocol makes a connection, checks whether the data is received, and resends it if it is not?
The solution for securing private data traveling over a public network, such as the Internet, is the use of what type of network?
The solution for securing private data traveling over a public network, such as the Internet, is the use of what type of network?
Originally developed by IBM, what protocol is used by Windows to share files and printers on a network?
Originally developed by IBM, what protocol is used by Windows to share files and printers on a network?
What tab can be used to configure a secondary configuration, such as a static IP if a DHCP server cannot be reached?
What tab can be used to configure a secondary configuration, such as a static IP if a DHCP server cannot be reached?
What functions as the name of a wireless network?
What functions as the name of a wireless network?
What type of device can be used to block unwanted traffic initiated from the Internet?
What type of device can be used to block unwanted traffic initiated from the Internet?
What wireless networking radio frequency yields faster speeds but offers shorter range?
What wireless networking radio frequency yields faster speeds but offers shorter range?
What command can be used to flush the local DNS cache on a Windows computer?
What command can be used to flush the local DNS cache on a Windows computer?
What TCP port is utilized by an SSH server listening for connections?
What TCP port is utilized by an SSH server listening for connections?
The Remote Desktop and Remote Assistance applications utilize what port for remote access?
The Remote Desktop and Remote Assistance applications utilize what port for remote access?
What cell phone technology is the most popular in the United States?
What cell phone technology is the most popular in the United States?
What device handles access to another network for a client computer if it does not have a better option?
What device handles access to another network for a client computer if it does not have a better option?
If a device does not receive an IP address from a DHCP server, the device may resort to what kind of IP address?
If a device does not receive an IP address from a DHCP server, the device may resort to what kind of IP address?
The ability to send and receive transmissions at the same time on an Ethernet cable is referred to by what term?
The ability to send and receive transmissions at the same time on an Ethernet cable is referred to by what term?
Unicast addresses include what types of addresses? (Choose all that apply)
Unicast addresses include what types of addresses? (Choose all that apply)
What functions might be provided by a SOHO router besides the normal duty of routing packets between networks? (Choose all that apply)
What functions might be provided by a SOHO router besides the normal duty of routing packets between networks? (Choose all that apply)
What two protocols are used to deliver mail messages?
What two protocols are used to deliver mail messages?
What two terms are used to describe the User Datagram Protocol (UDP)?
What two terms are used to describe the User Datagram Protocol (UDP)?
What two protocols are used for remote access to a server, using unencrypted and encrypted transmissions respectively?
What two protocols are used for remote access to a server, using unencrypted and encrypted transmissions respectively?
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Study Notes
Networking Protocols and IP Addressing
- Telnet Protocol: Does not encrypt data, making it vulnerable to interception.
- Static IP Addressing: Requires manual configuration; does not automatically set up network connections.
- Virtual Networks: Capable of encrypting data; the assertion about their insecurity is false.
- User Datagram Protocol (UDP): Does not guarantee data delivery; utilizes a connectionless format.
- Server Message Block (SMB): Current version is CIFS, also referred to as SMB2, for file and printer sharing.
IP Address Essentials
- IP Address: A unique 32-bit or 128-bit identifier for devices on a network.
- Public IP Addresses: Accessible via the Internet and used for identification.
- Dynamic IP Address: Assigned by a server upon a device's initial network connection.
- Subnet Mask: Divides an IP address into network and host portions, essential for routing.
Command Line Tools
- ipconfig: Command to display all assigned IP addresses on a device.
- ipconfig /flushdns: Command to clear the DNS cache on Windows systems.
Addressing and Connectivity
- Unicast Addressing: Delivers packets to a single target node.
- Transmission Control Protocol (TCP): Establishes a connection, ensuring data delivery; resends lost packets.
- Virtual Private Network (VPN): Secures private data over public networks, protecting information flow.
Wireless and Network Infrastructure
- SSID: Designates the name of a wireless network.
- Firewall: Protects networks by blocking unwanted external traffic and managing internal access.
- 5 GHz Frequency: Offers higher speeds but shorter range in wireless networks.
Protocols and Ports
- SSH (Secure Shell): Operates on port 22 for secure remote access to servers.
- Remote Desktop Services: Use port 3389 for remote connections.
Mobile and Network Devices
- CDMA: The most prevalent mobile technology in the United States.
- Default Gateway: Serves as the access point for client computers connecting to external networks.
Special Addressing Scenarios
- APIPA: Automatic Private IP Addressing for devices unable to acquire an IP from a DHCP server.
- Full Duplex: Enables simultaneous sending and receiving on Ethernet networks.
Address Types and Router Functions
- Unicast Addresses: Include global and link-local types.
- SOHO Routers: Often equipped with firewalls and wireless access points beyond standard routing functionality.
Mail Protocols
- Mail Transfer Protocols: Include POP3 and IMAP4 for sending and receiving emails.
User Datagram Protocol (UDP) Characteristics
- Connectionless Protocol: UDP operates without a dedicated connection; promotes high-speed data transmission.
- Best Effort Protocol: Provides no delivery guarantees, contrasting with TCP's reliable service.
Remote Access Methods
- Telnet and SSH: Utilized for remote server access; Telnet is unencrypted, while SSH provides encryption for secure communications.
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