Skip to main content

Summary Module 1

Summary Module 1

Before students begin Module 2, they must be able to explain the concepts of NAT, PAT, and DHCP.
Online assessment options include the end-of-module online quiz in the curriculum and the online Module 1 exam. From memory, students should be able to fill in Drag and Drop assessments for Basic NAT Operation and NAT with Overload. Students should also be able to complete a Checkbox activity for the advantages and disadvantages of NAT.
A comprehension of the following key points should have been achieved:
  • Private addresses are for private, internal use and should never be routed by a public Internet router.
  • NAT alters the IP header of a packet so that the destination address, the source address, or both addresses are replaced with different addresses.
  • PAT uses unique source port numbers on the inside global IP address to distinguish between translations.
  • NAT translations can occur dynamically or statically and can be used for a variety of uses.
  • NAT and PAT may be configured for static translation, dynamic translation, and overloading.
  • The process for verifying NAT and PAT configuration includes the clear and show commands.
  • The debug ip nat command is used for troubleshooting NAT and PAT configuration.
  • NAT has advantages and disadvantages.
  • DHCP works in a client/server mode. This enables clients to obtain IP configurations from a DHCP server.
  • BOOTP is the predecessor of DHCP and shares some operational characteristics with DHCP. However, BOOTP is not dynamic.
  • A DHCP server manages pools of IP addresses and associated parameters. Each pool is dedicated to an individual logical IP subnet.
  • The DHCP client configuration process has four steps.
  • A DCHP server is usually configured to assign more than IP addresses.
  • The show ip dhcp binding command is used to verify DHCP operation.
  • The debug ip dhcp server events command is used to troubleshoot DHCP.
When a DHCP server and a client are not on the same segment and are separated by a router, the ip helper-address command is used to relay broadcast requests. 

 An understanding of the following key points should have been achieved:
  • Private addresses are for private, internal use and should never be routed by a public Internet router.
  • NAT alters the IP header of a packet so that the destination address, the source address, or both addresses are replaced with different addresses.
  • PAT uses unique source port numbers on the inside global IP address to distinguish between translations.
  • NAT translations can occur dynamically or statically and can be used for a variety of uses.
  • NAT and PAT may be configured for static translation, dynamic translation, and overloading.
  • The process for verifying NAT and PAT configuration include the clear and show commands.
  • The debug ip nat command is used for troubleshooting NAT and PAT configuration.
  • NAT has advantages and disadvantages.
  • DHCP works in a client/server mode, enabling clients to obtain IP configurations from a DHCP server.
  • BOOTP is the predecessor of DHCP and shares some operational characteristics with DHCP, but BOOTP is not dynamic.
  • A DHCP server manages pools of IP addresses and associated parameters. Each pool is dedicated to an individual logical IP subnet.
  • The DHCP client configuration process has four steps.
  • Usually, a DCHP server is configured to assign more than IP addresses.
  • The show ip dhcp binding command is used to verify DHCP operation.
  • The debug ip dhcp server events command is used for troubleshooting DHCP.
When a DHCP server and a client are not on the same segment and are separated by a router, the ip helper-address command is used to relay broadcast requests. 

Comments

Post a Comment

Popular posts from this blog

OSI layers / Peer-to-peer communications / TCP/IP model

OSI layers 2.3.4 This page discusses the seven layers of the OSI model. The OSI reference model is a framework that is used to understand how information travels throughout a network. The OSI reference model explains how packets travel through the various layers to another device on a network, even if the sender and destination have different types of network media. In the OSI reference model, there are seven numbered layers, each of which illustrates a particular network function. - Dividing the network into seven layers provides the following advantages: • It breaks network communication into smaller, more manageable parts. • It standardizes network components to allow multiple vendor development and support. • It allows different types of network hardware and software to communicate with each other. • It prevents changes in one layer from affecting other layers. • It divides network communication into smaller parts to make learning it easier to understand. In the foll...
Post a Comment
Read more

PC Basic...

• Backplane – A backplane is an electronic circuit board containing circuitry and sockets into which additional electronic devices on other circuit boards or cards can be plugged; in a computer, generally synonymous with or part of the motherboard. • Network interface card (NIC) – An expansion board inserted into a computer so that the computer can be connected to a network. • Video card – A board that plugs into a PC to give it display capabilities. • Audio card – An expansion board that enables a computer to manipulate and output sounds. • Parallel port – An interface capable of transferring more than one bit simultaneously that is used to connect external devices such as printers. • Serial port – An interface that can be used for serial communication in which only one bit is transmitted at a time. • Mouse port – A port used to connect a mouse to a PC. • USB port – A Universal Serial Bus connector. A USB port connects devices such as a mouse or printer to the computer ...
Post a Comment
Read more

Advantages and disadvantages of link-state routing

Advantages and disadvantages of link-state routing 2.1.5  This page lists the advantages and disadvantages of link-state routing protocols. The following are advantages of link-state routing protocols:  Link-state protocols use cost metrics to choose paths through the network. The cost metric reflects the capacity of the links on those paths. Link-state protocols use triggered updates and LSA floods to immediately report changes in the network topology to all routers in the network. This leads to fast convergence times. Each router has a complete and synchronized picture of the network. Therefore, it is very difficult for routing loops to occur. Routers use the latest information to make the best routing decisions. The link-state database sizes can be minimized with careful network design. This leads to smaller Dijkstra calculations and faster convergence. Every router, at the very least, maps the topology of it...
Post a Comment
Read more