Ct1304 Lecture#4 IPV4 Addressing Asma AlOsaimi.

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Presentation transcript:

Ct1304 Lecture#4 IPV4 Addressing Asma AlOsaimi

Topics IPv4 Address Structure IPv4 Subnet Mask IPv4 Unicast, Broadcast, and Multicast Types of IPv4 Address Chapter 8 Sections

IPv4 Address Structure Binary Number System

IPv4 Address Structure Converting a Binary Address to Decimal Section 8.1.1.3 & 8.1.1.4 Converting a Binary Address to Decimal

IPv4 Address Structure Converting from Decimal to Binary (Cont.)

IPv4 Subnet Mask Network Portion and Host Portion of an IPv4 Address To define the network and host portions of an address, a devices use a separate 32-bit pattern called a subnet mask The subnet mask does not actually contain the network or host portion of an IPv4 address, it just says where to look for these portions in a given IPv4 address 8.1.2.1 Network Portion and Host Portion of an IPv4 Address

IPv4 Subnet Mask Network Portion and Host Portion of an IPv4 Address (cont.) Valid Subnet Masks 8.1.2.1 Network Portion and Host Portion of an IPv4 Address (cont.)

IPv4 Subnet Mask Examining the Prefix Length

IPv4 Subnet Mask IPv4 Network, Host, and Broadcast Address 10.1.1.0/24 8.1.2.3 IPv4 Network, Host and Broadcast Address

IPv4 Subnet Mask First Host and Last Host Addresses 10.1.1.0/24 8.1.2.4 First Host and Last Host Addresses

IPv4 Subnet Mask Bitwise AND Operation 1 AND 1 = 1 1 AND 0 = 0 0 AND 1 = 0 0 AND 0 = 0 8.1.2.5 and 8.1.2.6 Bitwise AND Operation/Importance of ANDing

LAN Interface Properties Configuring a Static IPv4 Address IPv4 Unicast, Broadcast, and Multicast Assigning a Static IPv4 Address to a Host LAN Interface Properties Configuring a Static IPv4 Address 8.1.3.1 Assigning a Static IPv4 Address to a Host

IPv4 Unicast, Broadcast, and Multicast Assigning a Dynamic IPv4 Address to a Host Verification 8.1.3.2 Assigning a Dynamic IPv4 Address to a Host DHCP – The preferred method of assigning IPv4 addresses to hosts on large networks because it reduces the load on network support staff and virtually eliminates entry errors.

IPv4 Unicast, Broadcast, and Multicast Unicast Transmission In an IPv4 network, the hosts can communicate one of three different ways: Unicast, Broadcast, and Multicast #1 Unicast – the process of sending a packet from one host to an individual host. 8.1.3.3 Unicast Transmission

IPv4 Unicast, Broadcast, and Multicast Broadcast Transmission #2 Broadcast – the process of sending a packet from one host to all hosts in the network. Directed broadcast Destination 172.16.4.255 Hosts within the 172.16.4.0/24 network NOTE: Routers do not forward a limited broadcast! 8.1.3.4 Broadcast Transmission Directed broadcast Destination 172.16.4.255 Hosts within the 172.16.4.0/24 network

IPv4 Unicast, Broadcast, and Multicast Multicast Transmission #3 Multicast – The process of sending a packet from one host to a selected group of hosts, possibly in different networks. Reduces traffic Reserved for addressing multicast groups – 224.0.0.0 to 239.255.255.255.  Link local –  224.0.0.0 to 224.0.0.255 (Example: routing information exchanged by routing protocols) Globally scoped addresses – 224.0.1.0 to 238.255.255.255 (Example: 224.0.1.1 has been reserved for Network Time Protocol) 8.1.3.5 Multicast Transmission

Types of IPv4 Address Public and Private IPv4 Addresses Private address blocks are: Hosts that do not require access to the Internet can use private addresses 10.0.0.0 to 10.255.255.255 (10.0.0.0/8) 172.16.0.0 to 172.31.255.255 (172.16.0.0/12) 192.168.0.0 to 192.168.255.255 (192.168.0.0/16) Shared address space addresses: Not globally routable Intended only for use in service provider networks Address block is 100.64.0.0/10 8.1.4.1 Public and Private IPv4 Addresses

Types of IPv4 Address Special Use IPv4 Addresses Network and Broadcast addresses – within each network the first and last addresses cannot be assigned to hosts Loopback address – 127.0.0.1 a special address that hosts use to direct traffic to themselves (addresses 127.0.0.0 to 127.255.255.255 are reserved) Link-Local address – 169.254.0.0 to 169.254.255.255 (169.254.0.0/16) addresses can be automatically assigned to the local host TEST-NET addresses – 192.0.2.0 to 192.0.2.255 (192.0.2.0/24) set aside for teaching and learning purposes, used in documentation and network examples Experimental addresses – 240.0.0.0 to 255.255.255.254 are listed as reserved 8.1.4.3 Special Use IPv4 Addresses

Types of IPv4 Address Legacy Classful Addressing See if updated graphic with top row in text case for consistency. Types of IPv4 Address Legacy Classful Addressing 8.1.4.4 Legacy Classful Addressing

Types of IPv4 Address Legacy Classful Addressing (cont.) Classless Addressing Formal name is Classless Inter-Domain Routing (CIDR, pronounced “cider Created a new set of standards that allowed service providers to allocate IPv4 addresses on any address bit boundary (prefix length) instead of only by a class A, B, or C address 8.1.4.4 Legacy Classful Addressing (cont.)