1 DHCP Dynamic Host Configuration Protocol

pcbuck April 22, 2021 0 Comments

IP Address Notation

Command Prompt – Ping – Responsive IP Address.IP addresses have certain rules for how they are constructed and written.Learn to recognize what IP addresses look like and how to find your IP addresson different kinds of devices.

The IP Address Space

The numeric values of IP addresses fall into certain ranges. Some numberranges are restricted in how they can be used. Due to these restrictions, theprocess of IP address assignment becomes extremely important to get right. Seethe difference between private IP addresses and public IP addresses.

Network Naming and Internet Protocol

The Internet would be extremely difficult to use if sites all had to bebrowsed by their IP addresses. Discover how the Internet manages its hugecollection of domains through a Domain Name System (DNS) and how some businessnetworks use a related technology called Windows Internet Naming Service(WINS).

Hardware Addresses and Internet Protocol

Besides its IP address, every device on an IP network also possesses aphysical address (sometimes called a hardware address). These addresses areclosely linked to one specific device, unlike IP addresses that can bereassigned to different devices on a network. This lesson covers Media AccessControl and all about MAC addressing.

TCP/IP and Related Protocols

Many other network protocols run on top of IP. Two of them are especiallyimportant. Besides Internet Protocol itself, this is a good time to get asolid understanding of TCP and its cousin UDP.Thanks for letting us know!Tell us why!Other Not enough details Hard to understandTypes of Networking Protocols – ManageEngine OpManager

Network protocols

Network protocols are a set of rules, conventions, and data structures thatdictate how devices exchange data across networks. In other words, networkprotocols can be equated to languages that two devices must understand forseamless communication of information, regardless of their infrastructure anddesign disparities.

1. DHCP: Dynamic Host Configuration Protocol

DHCP is a communication protocol that enables network administrators toautomate the assignment of IP addresses in a network. In an IP network, everydevice connecting to the internet requires a unique IP. DHCP lets networkadmins distribute IP addresses from a central point and automatically send anew IP address when a device is plugged in from a different place in thenetwork. DHCP works on a client-server model.Advantages of using DHCP * Centralized management of IP addresses. * Seamless addition of new clients into a network. * Reuse of IP addresses, reducing the total number of IP addresses required.Disadvantages of using DHCP * Tracking internet activity becomes tedious, as the same device can have multiple IP addresses over a period of time. * Computers with DHCP cannot be used as servers, as their IPs change over time.

1. IP: Internet Protocol (IPv4)

IPv4 is a network layer protocol that contains addressing and controlinformation, which helps packets be routed in a network. IP works in tandemwith TCP to deliver data packets across the network. Under IP, each host isassigned a 32-bit address comprised of two major parts: the network number andhost number. The network number identifies a network and is assigned by theinternet, while the host number identifies a host on the network and isassigned by a network admin. The IP is only responsible for delivering thepackets, and TCP helps puts them back in the right order.Advantages * IPv4 encrypts data to ensure privacy and security. * With IP, routing data becomes more scalable and economical.Disadvantages * IPv4 is labor intensive, complex, and prone to errors.

2. IPv6: Internet Protocol version 6

IPv6 is the latest version of the Internet Protocol, a network layer protocolthat possesses addressing and control information for enabling packets to berouted in the network. IPv6 was created to deal with IPv4 exhaustion. Itincreases the IP address size from 32 bits to 128 bits to support more levelsof addressing.Advantages * More efficient routing and packet processing compared to IPv4. * Better security compared to IPv4.Disadvantages * IPv6 is not compatible with machines that run on IPv4. * Challenge in upgrading the devices to IPv6.

1. ARP: Address Resolution Protocol

The Address Resolution Protocol helps map IP addresses to physical machineaddresses (or a MAC address for Ethernet) recognized in the local network. Atable called an ARP cache is used to maintain a correlation between each IPaddress and its corresponding MAC address. ARP offers the rules to make thesecorrelations, and helps convert addresses in both directions.Advantages * MAC addresses need not be known or memorized, as the ARP cache contains all the MAC addresses and maps them automatically with IPs.Disadvantages * ARP is susceptible to security attacks called ARP spoofing attacks. * When using ARP, sometimes a hacker might be able to stop the traffic altogether. This is also known as ARP denial-of-services.

IP and MAC addresses

People often get confused trying to understand the difference between IP andMAC addresses.An IP address is the location of your device on the internet, whilst a MACaddress identifies the actual device.* * *

What is an IP address?

An IP address (Internet Protocol address) is the unique identification numbergiven to every device that is connected to the internet.It represents the unique location on which you are connected to the internet,allowing devices all over the world to communicate with each other.Without these unique location addresses, data could not be transmitted betweendevices accurately.IP addresses are similar to your postal address, you cannot expect to getletters to your home unless you have a unique way of identifying it from allthe other homes.When connecting to the internet, you are assigned an IP address to use foryour session. This is issued by your network or ISP.If you take your laptop to McDonalds and connect to the internet, the IPaddress will differ from when you connected to the internet in Starbucks. Thisis because the location you are using to connect to the internet has changed.An Internet Service Provider (ISP) will assign your home with an IP addressfor your family to use. These are usually dynamic address that may change fromtime to time, unless you pay extra for a static address that never changes.An IP address may look like:* * *

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