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Topic 19 TCP/IP Enabling Objectives 19.1 DESCRIBE the OSI model and the TCP/IP Protocol.

Topic 19 TCP/IP Enabling Objectives 19.1 DESCRIBE the OSI model and the TCP/IP Protocol. 19.2 DISCUSS IP addresses. 19.3 IDENTIFY common TCP/IP based protocols. Basic Network Components. Protocols. ICMP. HTTP. SMTP. IP. ARP. TELNET. RIP. IGP. LDAP. DNS. DHCP. SMB. IRC.

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Topic 19 TCP/IP Enabling Objectives 19.1 DESCRIBE the OSI model and the TCP/IP Protocol.

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  1. Topic 19 TCP/IP Enabling Objectives 19.1 DESCRIBE the OSI model and the TCP/IP Protocol. 19.2 DISCUSS IP addresses. 19.3 IDENTIFY common TCP/IP based protocols.

  2. Basic Network Components Protocols ICMP HTTP SMTP IP ARP TELNET RIP IGP LDAP DNS DHCP SMB IRC OSPF PPP IGMP FTP EGP PPTP TCP POP SNMP Network Devices Transfer Mediums

  3. Layer 7 Layer 6 Layer 5 Layer 4 Layer 3 Layer 2 Layer 1 Application Presentation Session Transport Network Data Link LLC Sublayer Physical MAC Sublayer OSI Reference Model

  4. Host B Host A Application Application End Product Presentation Presentation Screen Layout Session Session Start, Stop, Resume Transport Transport End-to-End Management Network Network Address and Routing Data Link Data Link Media Access Physical Physical Binary Transmission MEDIA How data transfer’s over a network

  5. OSI MODEL TCP/IP Model Application Presentation Application Session Transport Transport Network Network Data Link Data Link Physical Physical OSI model template for TCP/IP

  6. TCP/IP Model LAYER 5 Application IRC SMTP POP3 HTTP DNS SNMP TELNET Transport LAYER 4 TCP UDP BGP EGP DHCP RIP LAYER 3 Network IP ICMP IGMP IGP OSPF ARP/RARP LAYER 2 ETHERNET Physical LAYER 1

  7. IP Datagram Structure Version (4 bits) Header Length (4 bits) Type of Service (8 bits) Total length of Datagram (16 bits) Flags (3 bits) Datagram Identification (16 bits) Fragment Offset (13 bits) Header Checksum (16 bits) Time To Live (TTL) (8 bits) Protocol (8 bits) Source IP Address Destination IP Address IP Options (will be padded to fit in the 32-bit boundary) Data portion of Datagram

  8. TCP/IP Port Numbers Well known port numbers Port numbers in GCCS

  9. Each Device Requires 3 IP’s • Every device connected to a TCP/IP network requires at least one Internet Protocol (IP) address and it must be unique. • An IP address is commonly represented in dotted decimal notation; this makes them easier to read than in binary format. Example: 205.1.12.101 vice 11001101 00000001 00001100 01100101 • IP addresses are also broken down into classes. 1. Unique IP 2. Subnet Mask 1st Octet Range# Hosts CLASS A 1 – 126 16,777,214 CLASS B 128 – 191 65,534 CLASS C 192 – 223 254 CLASS D 224 – 239 Used for multicast Default Subnet Masks Class A 255.0.0.0 Class B 255.255.0.0 Class C 255.255.255.0 Class D N/A

  10. What does Subnet Mask do? IP Datagram “ANDING” Destination IP Address 11001101 . 00000001 . 00000011 . 00000001 205.1.3.1 = ANDING ANDING ANDING 255.255.255.0 = 11111111 . 11111111 . 11111111 . 00000000 = 11001101 . 00000001 . 00000011 . 00000000 205.1.3.0 Subnet Mask Extracted Network address Local Network Address = 205.1.2.0 205.1.3.0 205.1.2.0 Default Gateway

  11. Each Device Requires 3 IP’s (cont.) 3.

  12. Application Application ROUTER Transport Transport Network Network Network Data Link Data Link Data Link Physical Physical Physical 205.1.2.0 205.1.3.0 Basic IP Routing

  13. LETTER PROCESS SEND RECEIVE TYPED LETTER TYPED LETTER ADDRESSED ENVELOPE ADDRESSED ENVELOPE TYPED LETTER TYPED LETTER LETTER CARRIER BAG LETTER CARRIER BAG ADDRESSED ENVELOPE ADDRESSED ENVELOPE TYPED LETTER TYPED LETTER TCP/IP = Postal Service

  14. Letter analogy $.44

  15. Read Pages 19-15 through 19-19 Important Things to Know About IP Addressing!

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