Cisco CCNA: Networking fundamentals live free class

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Cisco CCNA certification is "Red Hot". And for good reasons, Cisco certified professionals command industry respect and better job openings. If you have been considering to do or not to do - join this free session and check out if CCNA indeed is the right track for you to follow or not.

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Cisco CCNA: Networking fundamentals live free class

  1. 1. How IP works? Network Fundamentals
  2. 2. Internet Protocol Characteristics <ul><li>Operates at the Network Layer of OSI </li></ul><ul><li>Connectinoless protocol </li></ul><ul><li>Packets are treated independently </li></ul><ul><li>Heirarchical addressing </li></ul><ul><li>Best effort delivery </li></ul><ul><li>No data-recovery features </li></ul><ul><li>Uses binary operation to make decision </li></ul>
  3. 3. Why IP Addresses ? <ul><li>They uniquely identify each device on an IP network. </li></ul><ul><li>Every host (PC, Laptop, server, networking device or peripheral) must have a unique address. </li></ul><ul><li>Host ID: </li></ul><ul><ul><li>̶ Identifies the individual host </li></ul></ul><ul><ul><li>̶ is assigned by organizations to individual devices </li></ul></ul>Network.Host
  4. 4. IP PDU Header
  5. 5. IP Address Format: Dotted Decimal Notation
  6. 6. IP Address Classes: First Octet Rule
  7. 7. IP Address Ranges <ul><ul><li>*127 (01111111) is a Class A address reserved for loopback testing and cannot be assigned to a network. </li></ul></ul>
  8. 8. Reserved Addresses
  9. 9. Public IP Addresses
  10. 10. Private IP Addresses
  11. 11. DHCP
  12. 12. DNS <ul><li>Application specified in the TCP/IP suite </li></ul><ul><li>A way to transform human-readable names into IP addresses </li></ul>
  13. 13. Network Connection
  14. 14. ipconfig
  15. 15. Ipconfig/all
  16. 16. Summary <ul><li>IP network addresses consist of 2 parts: network ID and host ID. </li></ul><ul><li>Ipv4 addresses have 32 bits that are divided into octets and are generally shown in dotted decimal form (such as, 10.0.0.2) </li></ul><ul><li>When written in a binary format, the first bit of a Class A address is always 0, the first 2 bits of a Class B address are always 10, and the first 3 bits of a cLass C address are always 110. </li></ul>
  17. 17. Summary (Cont.) <ul><li>Certain IP addresses (network and broadcast) are reserved and cannot be assigned. </li></ul><ul><li>Internet hosts require a unique public IP address, but private hosts can have any valid private IP address that is unique within the private network. </li></ul><ul><li>DHCP assigns IP addresses, subnet mask, defaul gateway and DNS servers automatically. </li></ul><ul><li>DNS resolves host names to IP addresses. </li></ul>
  18. 18. Summary (Cont.) <ul><li>Hosts provide tools that can be used to verfiy the IP address of the host: </li></ul><ul><li>̶ Network connections </li></ul><ul><li>̶ ipconfg in wondows, and </li></ul><ul><li>̶ ifconfig in Linux. </li></ul>

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