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Topic: Classes of IP addresses

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	RFC 1375 (rfc1375) - Suggestion for New Classes of IP Addresses
		Class F addresses are defined as follows: The sixth type of address, class F, has a 23-bit network number, and a 4-bit local address.
		Class H is to be defined as follows: The eighth type of address, class H, has a 22-bit network number, and a 3-bit local address.
		Class K is to be defined as follows: The eighth type of address, class K, has a 25-bit network number, and a 1-bit local address.
	www.faqs.org /rfcs/rfc1375.html (1734 words)

	Howstuffworks "What is an IP address?"
		IP addresses with a first octet from 1 to 126 are part of this class.
		IP addresses with a first octet from 128 to 191 are part of this class.
		IP addresses with a first octet from 192 to 223 are part of this class.
	computer.howstuffworks.com /question549.htm (861 words)

	[No title]
		One problem is in the granularity of IP addressing, in that the smallest possible IP address one may obtain allows for as high as 254 IP addresses.
		Class H is to be defined as follows: The eighth type of address, class H, has a 22-bit network number, and a 3-bit local address.
		Class K is to be defined as follows: The eighth type of address, class K, has a 25-bit network number, and a 1-bit local address.
	www.ietf.org /rfc/rfc1375.txt (1695 words)

	Howstuffworks "What is an IP address?"
		For example, the IP address 0.0.0.0 is reserved for the default network and the address 255.255.255.255 is used for broadcasts.
		IP addresses with a first octet from 1 to 126 are part of this class.
		IP addresses with a first octet from 192 to 223 are part of this class.
	www.howstuffworks.com /question549.htm (780 words)

	IP Addressing: Questions & Answers
		IP addresses are classified based on the number of bytes allocated to the Network ID and the Host ID in an IP address.
		The class of an IP address can be determined from the first four bits of the first byte of the IP address.
		Class A IP address is used for a network with large number of hosts.
	www.geocities.com /SiliconValley/Vista/8672/network/ipaddr.html (1382 words)

	Classful network - Wikipedia, the free encyclopedia
		Classful networking is the name given to the first round of changes to the structure of the IP address in IPv4.
		The IP address netmask (which is so commonly associated with an IP address today) was not required because the mask length was part of the IP address itself.
		Early allocations of IP addresses by IANA were in some cases not made very efficiently, which contributed to the problem.
	en.wikipedia.org /wiki/Classes_of_IP_addresses (645 words)

	IP Routing and Subnets
		IP addresses are 32 bit integers which are represented in the familiar dot based notation.
		For example, a class A IP address is suitable when the internet consists of a small number of networks but each network consists of a large number of hosts.
		The destination IP address is masked with the subnet mask and then compared with the destination field for all entries in the routing table.
	www.eventhelix.com /RealtimeMantra/Networking/ip_routing.htm (1022 words)

	[No title]
		IP addresses are used to uniquely identify individual TCP/IP networks and hosts (computers and printers) on networks in order for devices to communicate.
		There are 5 different classes of IP addresses and depending on the class, the network and host part of the address will use a different number of bits.
		As an example, the class A address of 118.0.0.5 is a valid IP address since the network portion (first eight bits equal to 118) is not all zeros and the host portion (the last 24 bits) is not all zeros or all ones.
	carbon.cudenver.edu /~bghosh/ismg4700/4700lab2.doc (1106 words)

	Seminar - IP Addressing
		The address shortage problem is aggravated by the fact that portions of the IP address space have not been efficiently allocated.
		Class E addresses have their leading four-bits set to 1-1-1-1 and are reserved for experimental use.
		IP addresses are a scarce resource and methods have been developed to conserve them.
	www.nextgendc.com /seminar_ip_addr.htm (1992 words)

	Classes Defined
		An example of a Class A address is 10.1.2.34 where 10.0.0.0 is the network and 0.1.2.34 is the host.
		An example of a Class B address is 207.21.32.12 which is a network of 207.21.32.0 with a host ID of 0.0.0.12.
		addresses are an experimental class of IP addresses reserved for use in the future.
	www.measureup.com /testobjects/MS_TCPIP4/5a67187.htm (524 words)

	Content
		IP addresses are used to uniquely identify individual TCP/IP networks and hosts (computers and printers) on those network in order for devices to communicate.
		This is a broadcast address for a class B (host portion 3rd and 4th octets is all ones) and cannot be used for a host address.
		This is a Class D network and class D is reserved for multicasting and can't be used as a commercial IP address.
	fog.ccsf.cc.ca.us /~pthiry/lab1041.html (1535 words)

	IP Addressing, subnet mask, wildcard mask
		IP addresses are divided into two parts, a Network ID and a Host ID each of which can be of varying bit lengths but always making 32 bits altogether.
		Class D addresses are used for multicasting and Class E addresses are used in research.
		The IP address given to this company was 146.162.0.0 (which is a Class B address), and the decision was made to use the whole of octet 3 for the subnet addresses leaving octet 4 for the host addresses.
	www.rhyshaden.com /ipadd.htm (2645 words)

	IP Addresses
		Class C: The network identifier is 3 bytes and the host identifier is 1 byte.
		Class D: It starts with the bits 1110 and it is used as a multicast address.
		The granularity of IP address classes leads often to poor utilization of the address space and to limited ability to address subgroups within a network.
	www.cis.temple.edu /~ingargio/cis307/readings/ipaddress.html (691 words)

	[No title]
		IP Addresses are no exception to this "rule".
		And, depending on the Class to which the IP Address belongs, we can determine which portion of the IP Address is the Network ID and which is the Node ID.
		The IP Address with all bits set to "1" is a broadcast address and must NOT be used.
	www.firewall.cx /ip-classes.php (1232 words)

	TCP/IP tutorial
		IP addressing is based on the concept of hosts and networks.
		This way, A knows from C's IP address that it is on its own network, and similarly for E. Within C, the routing module will know from the network number of each interface which one to use for forwarding IP packets.
		Assume that the node A is the G1000 and is assigned the IP address 210.20.30.45, and that the gateway address is 199.99.88.77.
	www.jbmelectronics.com /product/tcp.htm (2865 words)

	Tech Info - IP Subnets and Stuff
		To counteract this trend the adoption of IP by the wireless 3G consortium will place increasing pressure for the IPv6 standard to simplify the allocation of IP addresses to the vast quantity of mobile devices the world seems capable of consuming.
		The use of PRIVATE address means that the same IP addresses may be reused by many organisations (saving millions of IPv4 addresses) and only when the traffic is sent to the PUBLIC network must it be translated (via NAT) to a PUBLIC address.
		IP addresses may be either statically allocated or dynamically allocated by a service provider.
	www.zytrax.com /tech/protocols/ip-classes.html (2532 words)

	NETBOOK - Chapter 18 Materials (Site not responding. Last check: 2007-11-07)
		The five classes of IP addresses in the original classful scheme.
		The address assigned to a host is either class A, B, or C; the prefix identifies a network, and the suffix is unique to a host on that network.
		The mapping between the first four bits of an IP address and the class of the address.
	www.netbook.cs.purdue.edu /othrpags/ch18.htm (225 words)

	Naming in the Internet: Autonomous Systems, Routers, IP Addresses
		For example a bridge may use Ethernet addresses while a router uses IP addresses.] It does all the transformations that may be required by the transfer of packets across the networks it connects.
		IP addresses are associated to host interfaces, not directly to hosts.
		The stress here is on "at one instant": though usually IP addresses are permanently bound to MAC addresses, it is now possible for a network to dynamically associate IP addresses to interfaces using the Dynamic Host Configuration protocol (DHCP).
	www.cis.temple.edu /~ingargio/old/cis307s00/readings/autonomsys.html (2966 words)

	Practice questions for comptia inet+ (inet plus) exam: Network classes.
		IP addresses are written using decimal numbers separated by decimal points.
		This is called dotted decimal notation of expressing IP addresses.
		Network address of all 1s means " all networks", same as hexadecimal of all Fs.
	www.simulationexams.com /SampleQuestions/comptia/inet_q1.htm (116 words)

	What is IP address? - A Word Definition From the Webopedia Computer Dictionary
		The format of an IP address is a 32-bit numeric address written as four numbers separated by periods.
		The four numbers in an IP address are used in different ways to identify a particular network and a host on that network.
		The number of unassigned Internet addresses is running out, so a new classless scheme called CIDR is gradually replacing the system based on classes A, B, and C and is tied to adoption of IPv6.
	www.webopedia.com /TERM/I/IP_address.html (640 words)

	Simplified IP Addressing
		Thus, an IP address of 205.140.187.31 is a class C address, since the first byte is 205.
		I know there are five classes of IP addresses, and the first byte of the IP address tells you to which class it belongs.
		Hence, ANDing the default mask with the IP address yields the address of the network that particular host is on, i.e., 142.168.0.0.
	www.linuxjournal.com /node/3400/print (2438 words)

	ccna certification exam cram
		IP addresses are written using decimal numbers separated by decimal points.
		Class B network has the form N.N.H.H. Therefore, we have a total of 16 bits (two octets) for assigning to internal networks and hosts.
		Class B network has the form N.N.H.H, the default subnet mask is 16 bits long.
	www.examguides.com /cisco-ccna.htm (900 words)

	Sangoma - TCP/IP
		An IP address is 32 bits wide, and as discussed, it is composed of two parts: the network number, and the host number [1, 2, 3].
		If the organization happened to have just one computer, C, and the entire Class C address is available for use, then the IP address for C may be anything in the range 210.20.30.1 to 210.20.30.253, and its default gateway would be 210.20.30.254 with Netmask ask 255.255.255.0.
		Packages such as IP Masquerade under Linux, monitor the traffic destined for the WAN and translate the addresses from those used on the LAN to a single assigned public IP address.
	www.sangoma.com /main/support/tutorials/tcpip (5494 words)

	InterNIC Groups IP Addresses into 5 Classes (Site not responding. Last check: 2007-11-07)
		Class A - addresses for governments throughout the world.
		Class D and E - are for multicast purposes and experimental purposes.
		Let’s look at the formats for IP numbers assigned to the different classes.
	www.chetbacon.com /lessonplans/CiscoIP/tsld006.htm (159 words)

	SpamCop.net - SpamCop FAQ: What is the SpamCop Blocking List (SCBL)?
		The SCBL is a list of IP addresses which have transmitted reported email to SpamCop users, which in turn is used to block and filter unwanted email.
		We count the total number of queries for each IP address and whether or not that IP address appears on the SCBL, to generate an estimate of how much email is transmitted by each IP.
		As a result, IP addresses which do not host a misconfigured or insecure server, but do send reported mail, may be listed.
	spamcop.net /fom-serve/cache/297.html (1426 words)

	► ADRESSE-IP.com Vérifiez votre ADRESSE IP pendant vos surfs
		Le choix des nombres composants une adresse IP n'est pas laissé au hasard, au contraire il fait l'objet d'une attention particulière notamment pour faciliter les opérations de routage.
		Les adresses IP sont alors restituées puis ré-attribuées à d'autres utilisateurs.
		Pour conclure ce chapitre sur l'adressage IP, il faut nous donner quelques précisions supplémentaires.
	www.adresse-ip.com (3176 words)

	TCP/IP network address range - CCNA practice questions.
		IP address range classification (Class A, Class B, Class C and Class D) Home
		Which of the following is Class C IP address?
		Host (Node) address of all zeros mean "This Host (Node)".
	www.simulationexams.com /SampleQuestions/ccna_q1.htm (155 words)

	[No title]
		IP2Location is a database that identifies the geographical location of IP addresses being used in Internet address space.
		You can use it to identify the geographic location of your Web site visitors by their IP addresses.
		There are a couple of instances where it won't help you much, specifically when dealing with subscribers of ISPs like AOL, who issue all their users IP addresses out of Reston, VA regardless of where they live.
	msdn.microsoft.com /msdnmag/issues/05/03/NewStuff (1220 words)

	[No title]
		Given the three classes of IP unicast addresses, what is the maximum size of the forwarding table at an IP router (not including multicast routing tables)?
		One fundamental cause of this problem is the lack of a network class of a size that is appropriate for a mid-sized organization.
		Class-C, with a maximum of 254 host addresses, is too small, while class-B, which allows up to 65534 addresses, is too large to be densely populated.
	www.cs.virginia.edu /~zaher/classes/CS457/lectures/network_2.ppt (373 words)

	What is an IP Address - HowStuffWorks - Computer Networks
		mso-list:l3 level1 lfo3;tab-stops:list.5in'> 10.0pt;font-family:Verdana;mso-bidi-font-family:Arial'>Default Network - The IP address of 0.0.0.0 is used for the default network.
		mso-list:l5 level1 lfo4;tab-stops:list.5in'> 10.0pt;font-family:Verdana;mso-bidi-font-family:Arial'>Loopback - The IP address 127.0.0.1 is used as the loopback address.
		mso-list:l0 level1 lfo6;tab-stops:list.5in'> 10.0pt;font-family:Verdana;mso-bidi-font-family:Arial'>Class D - Used for multicasts, Class D is slightly different from the first three classes.
	www.bellaonline.com /ArticlesP/art2399.asp (828 words)

	RubyForge: IP - Addresses and CIDR Ranges: Project Info (Site not responding. Last check: 2007-11-07)
		RubyForge: IP - Addresses and CIDR Ranges: Project Info
		IP provides classes that manage IP addresses, netmasks, and ranges.
		There is also a class to manage CIDR-formatted address ranges.
	rubyforge.org /projects/ip-address (29 words)

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