NETWORKS

NETWORKS

1. Dynamic Routing

   • Is a networking technique that provides optimal data routing, unlike static routing, dynamic routing enables routers to select paths according to real-time logical network layout changes.
     • STATIC
       • May use manually configured routing tables
     • DYNAMIC
       • Adaptative routing

2. DHCP

   • Dynamic Host Configuration Protocol

3. Desirable Characteristic of Dynamic Routing

   • Scalability

4. Convergence

   • Is when all the routers have the same routing information

5. Interior Gateway Protocols

   • RIP, EIGRP, ISIS OSPF
     • RIP
       • Routing Information Protocol
         • RIPv1 is classful, and officially obsolete RIPv2 is classless
     • IGRP/EIGRP
       • Enhanced Interior Gateway Routing Protocol
         • Predecessor was IGRP which was classful
     • IS-IS
       • Intermediate System to Intermediate System
         • Debate between benefits of ISIS and OSPF

6. OSPF

   • Open Shortest Path First
     • Dijkstra algorithm

7. SWITCHING TECHNIQUES

   • Circuit Switching ,Message Switching ,Packet Switching
     • CIRCUIT SWITCHING
       • Is a technique that directly connects the sender and the receiver in an unbroken path for example the telephone.
     • MESSAGE SWITCHING
       • Each node receives the entire message, stores it in its entirety on disk, and then transmits the message to the next node
     • PACKET SWITCHING
       • Combine the advantages of message and circuit switching and to minimize the disadvantages of both

8. ACL (Access Control Lists )

   • There are lists of conditions that are applied to traffic traveling across a router's interface
     • Verifying ACLs
       • The show ip interface command displays IP interface information and indicates whether any ACLs are set.
       • The show access-lists command displays the contents of all ACLs on the router.
       • The show running-config command will also reveal the access lists on a router and the interface assignment information.

9. Standard ACL Operation and Configuration

   • One ACL per protocol
     • To control traffic flow on an interface, an ACL must be defined for each protocol enabled on the interface.
   • One ACL per direction
     • ACLs control traffic in one direction at a time on an interface. Two separate ACLs must be created to control inbound and outbound traffic.
   • One ACL per interface
     • ACLs control traffic for an interface, for example, GigabitEthernet 0/0.