...(Dynamically Host Configuration Protocol) that uses a client/server protocol that automatically provides an Internet Protocol (IP) host with its IP address and other configurations information such as the subnet mask and default gateway. RFCs 2131 and 2132 define DHCP as an Internet Engineering Task Force (IETF) standard based on Bootstrap Protocol (BOOTP), a protocol which DHCP shares many operation details. DHCP allows hosts to obtain required TCP/IP configuration information from a DHCP server. Dynamically Host Configuration Protocol (DHCP) provides four key benefits to managing and maintaining a TCP/IP networks. Those four terms are centralized administration of IP configuration, Dynamic Host Configuration, Seamless IP host configuration, and Flexibility and Scalability. DHCP has reliable IP address configuration, which minimizes configuration errors caused by manual IP address configuration, such as address conflicts caused by the assignment of an IP address to more than one computer at the same time. DHCP also benefits in reducing network administration. DHCP reduce the network administration by using centralized and automated TCP/IP configuration. It has the ability to define the TCP/IP configurations from a central location and the ability to assign a full range of additional TCP/P configuration values by means of DHCP options. DHCP is safe and reliable configuration, and also reduces configuration management. Dynamic Host Configuration Protocol (DHCP) has some...
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...an acronym for Dynamic Host Configuration Protocol, is a protocol used to automatically assign a unique IP address to a device. DHCP allows a computer to join an IP-based network without having a pre-configured IP address. DHCP is a protocol that assigns unique IP addresses to devices, then releases and renews these addresses as devices leave and re-join the network. DHCP is also used to configure the proper subnet mask, default gateway, and DNS server information on the device. A computer, or any other device that connects to a network (local or Internet), must be properly configured to communicate on that network. Since DHCP allows that configuration to happen automatically, it's used in almost every device that connects to a network including computers, switches, smartphones, etc. When a computer or other networked device connects to a network, its DHCP client software in the operating system sends a broadcast query requesting necessary information. Any DHCP server on the network may service the request. The DHCP server manages a pool of IP addresses and information about client configuration parameters such as default gateway, domain name, the name servers, and time servers. On receiving a request, the server may respond with specific information for each client, as previously configured by an administrator, or with a specific address and any other information valid for the entire network, and the time period for which the allocation (lease) is valid. A host typically queries...
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...File Transfer Protocol (FTP) is a standard network protocol[->0] used to transfer files from one host[->1] to another host over a TCP[->2]-based network, such as the Internet[->3]. Network File System (NFS) is a distributed file system[->4] protocol originally developed by Sun Microsystems[->5] in 1984,[1] allowing a user on a client computer[->6] to access files over a network[->7] in a manner similar to how local storage is accessed Active Directory (AD) Like open directory- platform for exchange server. is a directory service[->8] created by Microsoft[->9] for Windows domain[->10] networks. It is included in most Windows Server[->11] operating systems. Software as a service- Centralized hosting of business applications (SaaS, pronounced sæs or sɑs[1]), sometimes referred to as "on-demand software" supplied by ISVs[->12] or "Application-Service-Providers" (ASPs), [2] is a software[->13] delivery model in which software and associated data[->14] are centrally hosted[->15] on the cloud[->16]. SaaS is typically accessed by users[->17] using a thin client[->18] via a web browser[->19]. • Amazon Web Services[->20] • Concur[->21] • ENFOS[->22] • Google Apps[->23] • HP Cloud Services[->24] • HubSpot[->25] • iCloud[->26] • Infor[->27] • Locus Technologies[->28] • Meltwater Group[->29] • Microsoft Office 365[->30] • Oracle[->31] • Salesforce[->32] • ServiceSource[->33] • Windows Azure[->34] • Workday[->35] • Zoho Office Suite[->36] OKTA- Single...
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...1. What is the primary means of identifying network devices and services in a Windows Server 2008 network? A) DHCP B) TCP/IP C) DNS D) IP Feedback: In a Windows Server 2008 network, the primary means of identifying network devices and services is through the use of DNS. Correct Answer(s): C 2. The process of obtaining an IP address for a computer name (for example, “ComputerA”) is called __________. A) name resolution B) address controlling C) address resolution D) name controlling Feedback: The process of obtaining an IP address for a computer name (for example, “ComputerA”) is called name resolution. Correct Answer(s): A 3. Which of the following is not a top-level domain name? A) .aero B) .coop C) .museum D) .corp Feedback: The available generic top-level domain names include .aero, .biz, .com, .coop, .edu, .gov, .info, .int, .mil, .museum, .name, .net, .org, and .pro. Correct Answer(s): D 4. The routing service included with Windows Server 2008 is better suited for __________. A) a smaller network B) a larger network C) a mid-size network D) large amounts of traffic Feedback: The routing service included with Windows Server 2008 is better suited for a smaller network or one with a small amount of network traffic that needs to pass between subnets. Correct Answer(s): A 5. Which feature is an integral part of IPv6, whereas it was an optional feature under IPv4? A) IP security B) subnetting C) DNS security D) name resolution Feedback: IP security through the use of IPSec...
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...the top of the hierarchy stand the root nameservers: the servers to query when looking up (resolving) a top-level domain name (TLD) Features • Scalability—Because DNS is capable of distributing workload across several databases or computers, it can scale to handle any level of name resolution required. • Constancy—Host names remain constant even when associated IP addresses change, which makes locating network resources much easier. • Ease of Use—Users access computers using easy-to-remember names such as www. microsoft.com rather than a numerical IP address, such as 192.168.1.100. • Simplicity—Users need to learn only one naming convention to find resources on either the Internet or an intranet. 2.) DHCP stands for Dynamic Host Configuration Protocol. As the name suggests, DHCP is used to control the network configuration of a host through a remote server. DHCP functionality comes installed as a default feature in most of the contemporary operating systems. DHCP is an excellent alternative to the time-consuming manual configuration of network settings on a host or a network device. Features · DHCP client alternate configuration With DHCP client alternate configuration, you can easily move a computer between two or more networks, one configured with static IP addresses and one or more configured with DHCP, without needing to reconfigure network adapter parameters, such as IP address, subnet mask, default gateway, preferred and alternate Domain Name Service (DNS) servers, and Windows...
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...software such as Adobe PDF’s. The AD-CS service is an excellent way to offer an extra layer of security among documents and files. Security layers consist of file encryption, digital signatures, and key authentication. AD-CS can also aid with Hyper Text Transfer Protocol Service (HTTPS) and authentication for employees using VPN services. Active Directory Domain Services Active Directory Domain Services allows computer, user, and device information to be stored. This allows for an easier, visual based management in a tree structured format; the domain is the host controller. AD-DS makes IT administration easier by allocating resources in one central, secure location. Active Directory Federation Services (ADFS) ADFS is a service which authenticates users in-between two parties over an extranet. This server provides user identity which recognizes and authenticates a user between two different servers, businesses, or locations in order to share access rights. Application Server Manages applications and operations between commonly used applications, servers, and users within a database. Dynamic Host Configuration Protocol (DHCP) Server DHCP services allows one static IP from an ISP to be allocated into multiple, dynamic IP addresses. This allows multiple computers to connect and access the internet; each one being...
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...The Dynamic Host Configuration Protocol (DHCP) is an Internet Engineering Task Force (IETF) standard designed to reduce the administration burden and complexity of configuring hosts on a Transmission Control Protocol/Internet Protocol (TCP/IP)-based network. DHCP is a communications protocol that allows network administrators to manage and automate IP (Internet Protocol) addresses on an organizations network. Using the Internet Protocol, each machine that can connect to the Internet needs a unique IP address, which is assigned when an Internet connection is created for a specific computer. Without DHCP, the IP address must be entered manually at each computer in an organization and a new IP address must be entered each time a computer moves to a new location on the network. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network. DHCP uses the concept of a "lease" or amount of time that a given IP address will be valid for a computer. The lease time can vary depending on how long a user is likely to require the Internet connection at its location. It's particularly useful in education and other environments where users change regularly. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are available IP addresses. The protocol also supports static addresses for computers...
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...Scenario 1: End user complains of lack of connectivity to any resource not on the directly connected network. The host cannot ping its default gateway. The output of the “ipconfig /all” command is below. Also the IP address assigned to the router for that segment is also displayed below. What do you think the problem is with the configuration of this host? PC “ipconfig /all” output (summarized) Ethernet adapter Local Area Connection: Physical Address. . . . . . . . . : 00-AB-C5-00-00-00 DHCP Enabled. . . . . . . . . . . : No IPv4 Address. . . . . . . . . . . : 192.168.40.9 Subnet Mask . . . . . . . . . . . : 255.255.255.128 Default Gateway . . . . . . . . . : 192.168.40.254 DNS Servers . . . . . . . . . . . : 8.8.8.8 Router “show ip interface brief” Router# show ip interface brief Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 192.168.40.254 YES NVRAM up up Answer: The problem is that either the IP address is wrong or the subnet mask is wrong. That is because the 192.168.40.9 IP address is not in the same subnet as the default gateway IP address (192.168.40.254). Changing the subnet mask to 255.255.255.0 or changing the IP address to 192.168.40.129 – 192.168.40.253 would resolve the problem. The ping command can be used to check for connectivity, and it was. The tracert command could have been used to see where the ping failed. Scenario 2: One user complains of lack of connectivity...
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...II Name: ____________________________________________________ Date: _______________________ NT1330 Week 1 Unit 1 Assignment 1 Instructions: 1. Complete this assignment and submit it prior to the beginning of the next class meeting. 2. Completely fill in the bubble for the correct answer(s), any other mark such as an X or just a line through it will be marked as incorrect. True/False Indicate whether the statement is true or false. 1. IPv6 uses 128 bits, or 16 bytes, for addressing, thus providing 2128 (about 340 billion) unique addresses. A True B False 2. Dynamic IP addresses can be assigned when administering TCP/IP hosts. These addresses must be configured and maintained manually. A B True False 3. Using DHCP relay agents eliminates the need to have a DHCP server on every subnet. A True B False 4. One benefit of the hierarchical structure of DNS is that it is possible to have two hosts with the same host names that are in different locations in the hierarchy. A B True False 5. ICS turns your computer into a router so that other computers on the local network can access its Internet connection. A B True False 6. If you inappropriately allowed network discovery in a public network environment (for example, an Internet café), you would allow total strangers to see and access any file shares on your system. A B True False Steve Todd Page 1 of 9 7. Because the software is installed into a single partition, the specified minimum...
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...IT-management overhead in reference to DNS and DHCP In order to address the issue of when is it cost effective to employ the use of DHCP for a computer network we first have to get a brief understanding of the terms DNS and DHCP. Domain Name Servers (DNS) for short is like a phone directory for the internet. They translate domain names into IP (Internet Protocol) addresses. Domain names are easier for people to remember, computers access the internet based on IP addresses. Dynamic Host Configuration Protocol (DHCP) is a network protocol that allows a server to automatically assign an IP address to a computer. Now that we have defined these two terms it is possible to analyze the cost effectiveness of a DHCP server. To manually configure a computer workstation with an IP address is not difficult. On the other hand to manually configure tens, hundreds, or thousands of workstations would be too time consuming, it also increases the chance of duplicating IP addresses, misconfiguring the subnet mask or other network protocols. It is in these instances that DHCP is not only a handy tool it is a needed tool for network administrators to perform their job. There are three main instances to manually assign addresses. 1) When there are no configured DHCP servers on the network and the network has multiple network segments. 2) When you are configuring a computer as a DHCP server, you assign that computer a static IP address. 3) When you configure computers as important network...
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...bubble for the correct answer(s), any other mark such as an X or just a line through it will be marked as incorrect. 1. DHCP frees system administrators from manually configuring each host on the network. A True B False 2. The smaller the network, the greater the benefit of using a dynamic address assignment. A True B False 3. DHCP provides three key benefits to those managing and maintaining a TCP/IP network. A True B False 4. The key aspect of the DHCP process is that it is dynamic. A True B False 5. Once a DHCP scope is defined and exclusion ranges are applied, the remaining addresses form what is called an available address pool within the scope. A B True False 6. To conserve disk space, DNS servers store only the most recent updates. A True B False 7. The primary DNS server for a zone is not required to perform an incremental zone transfer. A True B False Steve Todd Page 1 of 8 8. For replication of Active Directory–integrated zones, DNS notification is needed. A True B False 9. Scavenging is enabled by default. A True B False 10. As long as the TTL for a cached resource record does not expire, a DNS server can continue to cache and use the resource record again when answering queries by its clients that match these resource records. A B True False 11. The Reverse Address Resolution Protocol (RARP) was designed for what reason? A B C D to discover the Media Access Control (MAC) address (an address unique to a Network Interface Card) that corresponds to a particular...
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...is default and it will show up immediately you install the server. * After, select an installation language. This is what will see you through the installation process. * Choose the continent and country. This is very important because there are servers all over the world that the Ubuntu or Linux system can go in for updates. It looks for servers available in the specified region and relays you to that server. This makes updating quite easy. * You will then asked to select your keyboard layout or the keyboard detection. * It will load the components from the CD or bootable drive onto the system. * The installer then discovers your hardware configuration, and configures the network settings using Dynamic Host Configuration Protocol (DHCP) which will make everything automatic and find your local host name by default * However, if you want to configure the network manually, you will need a static IP address since it is a server. You can use the ipconfig command in the command prompt to find the subnet mask. Subnet mask is used to identify who is on your local network. A gateway is also connected to your router. Domain Server Address (DNS) holds the url of the IP address. * Next, the installer asks for the system's hostname, domain name...
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...the packets exchanged using the DHCP protocol in Wireshark. To understand this, first we must know what DHCP is. WHAT IS DHCP? DHCP is short for Dynamic Host Configuration Protocol. It is a network protocol in the IP suite that is used to provide IP address and other related configuration information like subnet masks and default gateway to all the hosts in an organization. DHCP also works as a client/server protocol. In small organizations, it is possible for a network administrator to manually assign the IP addresses to hosts in the network, depending on their requirements. But in large organizations it is impossible for a network administrator to manually assign IP addresses to all the hosts in the network. It is...
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...DNS and DHCP overhead DNS or Domain Name System is a service used by computers to translate human-friendly names into IP addresses. It’s like a phone book for the internet. DHCP or Dynamic Host Configuration Protocol is a networking protocol that configures devices that connect to a network can communicate on that network; it manages things like IP addresses, default routes and DNS server addresses. By using DNS and DHCP in concert, a site can happily grow to hundreds or thousands of nodes servers, desktop systems, laptops, printers, whatever, with minimal network/systems administrator effort. Both DNS and DHCP are essential tools in the network administrator's toolkit for managing all the IP devices on a corporate network. The more devices that require an IP address the more likely you are going to need DHCP and DNS to help maintain the IP addresses. The advantage of using dynamic IP addresses is that you avoid many common problems. For example, if you manually configure IP addresses, you must keep track of which addresses you have and haven't assigned, and to whom. If you accidentally assign two people the same address, of if a user monkeys around with his or her address, you can run into network problems that can be very hard to resolve. Furthermore, in many organizations, it's common practice to constantly move computers all over the building or between buildings. In such situations, if you were using static IP addresses, you'd be forced to change IP addresses to an...
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...commercial sensation it is today, and most networks were private and closed off from other networks around the world. When the Internet exploded, having only 32 bits to identify a unique Internet address caused people to panic that we'd run out of IP addresses. Under IPv4, there are 232 possible combinations, which offers just under 4.3 billion unique addresses. IPv6 raised that to a panic-relieving 2128 possible addresses. Later, we'll take a closer look at how to understand your computer's IPv4 or IPv6 addresses. How does your computer get its IP address? An IP address can be either dynamic or static. A static address is one that you configure yourself by editing your computer's network settings. This type of address is rare, and it can create network issues if you use it without a good understanding of TCP/IP. Dynamic addresses are the most common. They're assigned by the Dynamic Host Configuration...
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