Skip to main content

CCNA Recap: Random Mix of Notes


EMPLOYERS: This is me reviewing information I have been tested on and passed in the past.




Install Right to Use License
  • license boot module



Static Route
  • it is one
  • no number at the end means default admin distance

IPv6 Router Solicitation

  • FF02::2

Valid IPv6 Addresses

  • Eight groups of 
  • four hexidecimal digits that
  • represent sixteen bits =
  • two octects

Ipv6 Router Advertisement 
  • Type 134
  • Prefix length must be 64 bits (4 groups)

Restricting VTY / Telnet lines
  • access-class 

Remember your implicit deny! 

Switches
  • learn addressing
  • Forward Filter decisions
  • Loop Avoidance

SNMP alert on violation
  • protect
  • shutdown

disable a port (not restrict)
  • switchport port-security violation shutdown

Verify Port Security Configuration
  • show port-security interface

A layered network model
  • facilitates troubleshooting
  • breaks down networking into chunks
  • allow layers made by different vendors to interoperate

OSI (Open Systems Interconnect) model, top down
  • Application
  • Presentation
    • Encryption happens here
    • ‘can you read this?’
      • MIDI
      • GIF
      • TIFF
      • JPEG
      • MPEG
  • Session
  • transport
      • flow control
      • Error detection and recovery
    • TCP 
    • UDP
  • Network
      • Packets
    • ip
  • Data Link
        • MAC and LLC sublayers
      • Bridges
  • Physical 
      • Repeaters
      • hubs
    • Bit synchronization 

Remote switch access through router over serial link
  • Ip address in Int config mode (on switch)
  • ip default-gateway in global config mode (on switch)
  • password vty (switch)


EMPLOYERS: This is me reviewing information I have been tested on and passed in the ... past.
Labels:

Comments

Post a Comment

Popular posts from this blog

Connecting IoT Devices to a Registration Server (Packet Tracer, Cisco)

In Packet Tracer, a demo software made by Cisco Systems. It certainly has changed a lot since 2016. It's almost an Olympic feat to even get started with it now, but it does look snazzy. This is for the new CCNA, that integrates, among other things, IoT and Automation, which I've worked on here before. Instructions here . I don't know if this is an aspect of "Let's make sure people are paying attention and not simply following blindly", or an oversight - The instructions indicate a Meraki Server, when a regular one is the working option here. I have to enable the IoT service on this server. Also, we assign the server an IPv4 address from a DHCP pool instead of giving it a static one. For something that handles our IoT business, perhaps that's safer; Getting a new IPv4 address every week or so is a minimal step against an intruder, but it is a step. There are no devices associated with this new server; In an earlier lab (not shown), I attached them to 'H
Post a Comment
Read more

What Do You Need? [List of Offered Services]

2023 Version is here, at this handy Notion Page.
Post a Comment
Read more

Building, Breaking, and Building A CRM with Retool

 I like no- or low-code solutions to things. I've often wanted to simply push a button or move some GUI around and have the code implement itself.  I've thought about building something that's like a customer relationship management (CRM) system for keeping up with my network better than my little spreadsheet where I click links and then go like something. The general idea in this CRM Development is:  To have a GUI to add people to a NRM (Network Relationship Management).       Attach it to a database (MySQL is what I went with eventually using Amazon Relational Database service, but you can use PostGRES, and probably others).     Make sure components are connected to each other in the retool interface. This video is a good start. Watching the tutorial video, heard some SQL commands and went 'Oh no 😳" before going "Wait I know basic SQL", which is good, because you'll see.  When you get set up, there's a plethora of resources you can use -- Incl
Post a Comment
Read more