CST3607 Class Notes 2018-10-11

Exam #1

Access to Blackboard is required to take this exam.

The exam includes, but is not limited, to the following:

Chapters 1 – 5 from the CCNA Routing and Switching Study Guide 2nd Edition

  • You must be able to correctly answer all of the review questions at the end of each chapter.
  • Know the Exam Essentials & terminology from each chapter.
    • Chapter 1: Internetworking Basics & Models, OSI Reference Model
    • Chapter 2: Ethernet Networking and Data Encapsulation
    • Chapter 3: Introduction to TCP/IP
    • Chapter 4: Subnetting
    • Chapter 5: VLSM, Route Summarization
  • Collision Domains vs Broadcast Domains
    • Which device is used to separate broadcast domains?
    • How many collision domains does a switch have?
    • How many collision domains does a hub have?
    • How do VLANs change the topology of the LAN and the Broadcast Domain created by the router?
  • Unicast vs Broadcast vs Multicast
  • Ethernet cables: Straight-through vs Cross-over vs console
  • What is CSMA/CD? How does CSMA/CD work?
  • The number of bits and number of bytes in different types of addresses: IPv4, IPv6, MAC

OSI Reference Model:

  • The names and layer numbers of all 7 layers
  • The layer name that devices operatate on: e.g. Hub, Switch, Router, NIC
  • The type of addressing used on Layer 2, and Layer 3
  • The layer name that certain protocols operate on: e.g. ARP, IP, TCP, Telnet, FTP
  • Which layer of the OSI model is responsible for creating packets?
  • Which layer of the OSI model is responsible for creating frames?
  • Segmentation and reassembly of data from the upper-layer applications occurs at what layer?

Classfull vs Classless (CIDR) IP addressing

  • Define the “default mask”

Subnetting

  • Determine the # of bits for: Network, Host, Bits Borrowed.
  • Determine the Number of: Subnets, addresses per subnet, Wildcard mask.
  • Determine the dotted-decimal mask from the number of host bits or the prefix.
  • Count the borrowed bits on your fingers to determine the mask.
    • 1281922242402482522542551 bit2 bits3 bits4 bits5 bits6 bits7 bits8 bits
  • Determine the block size / increment of each subnet, and the correct octet that increments.
  • When subnetting, are we increasing or decreasing the number of 1’s for the network portion of the IP address?
  • When supernetting, are we increasing or decreasing the number of 1’s for the network portion of the IP address?

Converting a decimal number to its Base-256 dotted-decimal form.

  • VLSM / Classless Subnetting
  • Route Summarization / Route Aggregation / Network Address Aggregation

Protocols

  • Roles/function, and full name.
  • IPv4, DHCP, DNS, ARP, TCP, UDP, ICMP, etc.

Troubleshooting Commands

  • Ping <Target IP Address>
  • Tracert <Target IP Address>
  • ipconfig /all
  • arp -a
  • netstat

DHCP

  • All four phases of the DHCP handshake, in the correct order, and mode of transmission (unicast, broadcast) for each phase.
  • What is the purpose of the DHCP Scope on the DHCP Server?
  • Know the powers of 2 up to 8192.

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