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Questions and Answers
What is the main role of network services in computer networks?
What is the main role of network services in computer networks?
- Facilitating communication and resource sharing (correct)
- Enhancing hardware performance
- Organizing directory information
- Encrypting data transfers
What is the primary function of Directory Services?
What is the primary function of Directory Services?
- Mapping names to values (correct)
- Providing hardware maintenance
- Controlling internet access
- Facilitating social media interactions
How does Authentication differ from Authorization?
How does Authentication differ from Authorization?
- Authentication provides internet access, while authorization encrypts data
- Authentication manages hardware components, while authorization configures network settings
- Authentication verifies user identity, while authorization controls resource access (correct)
- Authentication stores user passwords, while authorization checks system performance
What is the purpose of Domain Name Services (DNS)?
What is the purpose of Domain Name Services (DNS)?
Which service is responsible for storing user information and organizing it for accessing?
Which service is responsible for storing user information and organizing it for accessing?
In an organization, what does Directory Services help in storing and making available?
In an organization, what does Directory Services help in storing and making available?
How do Directory Services assist in user authentication?
How do Directory Services assist in user authentication?
What aspect of network security is primarily handled by Authorization?
What aspect of network security is primarily handled by Authorization?
What key function does DNS perform for the internet?
What key function does DNS perform for the internet?
How does Directory Services differ from Accounting Services?
How does Directory Services differ from Accounting Services?
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Study Notes
TCP/IP Suite
- The TCP/IP suite includes key protocols such as TCP (reliable data transfer), IP (routing of data packets), DNS, DHCP, FTP, HTTP, and SMTP, each with its own specific function.
- TCP/IP is a set of protocols that operate at different levels, with four layers: Application, Transport, Internet, and Network Interface.
TCP/IP Addressing and Subnetting
- TCP/IP addressing is a system used to identify and communicate with devices on a network, consisting of an IP address and a subnet mask.
- The IP address is a unique identifier assigned to each device, while the subnet mask determines which part of the IP address identifies the network and which part identifies the host.
- Subnetting is the process of dividing a network into smaller subnets to improve performance and security.
Datagram Transmission
- Each datagram contains a field called Time to Live (TTL) that controls the situation.
- When a datagram visits a router, the TTL value is decremented by 1, and when it reaches 0, the router discards the datagram.
- A time-exceeded message is sent by the router to the original source when a datagram is discarded.
Configuring TCP/IP Network Settings
- Configuring TCP/IP network settings involves setting up IP addresses, subnet masks, default gateways, and DNS servers on devices.
- This can be done manually or through automated tools such as DHCP.
- Configuring network settings also involves enabling security features such as firewalls, antivirus software, and intrusion detection systems.
Troubleshooting TCP/IP Network Connectivity Issues
- Troubleshooting TCP/IP network connectivity issues involves using tools such as ping, tracert/traceroute, ipconfig/ifconfig, and nslookup.
- These tools help diagnose and troubleshoot problems at the network and system levels.
Network Services
- Network services are a fundamental component of modern computer networks, facilitating communication and resource sharing between devices.
- Examples of network services include Directory Services, Accounting, Authentication and Authorization, and Domain Name Services (DNS).
- DNS is a crucial service that maps IP addresses to domain names, making it easier to access information on the internet.
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