Training

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  YAML terminology and Ansible
  ansible yaml • • EddieJennings  

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  @Obsolesce said in YAML terminology and Ansible: @Pete-S said in YAML terminology and Ansible: @Obsolesce said in YAML terminology and Ansible: @Pete-S said in YAML terminology and Ansible: Other than that it doesn't matter to me what anyone calls it. You are 100% to call it whatever you want. But a key/value pair is commonly referred to as a dictionary... or a hash table which is a dictionary data type. This isn't exclusive to Python in the least. "Commonly referred" depends on the programming language in question. For example in many other languages it's commonly called an array or collection and never a dictionary. If you look at the part you quoted, YAML calls it mappings. The proper computer science terminology would be associative array. https://en.wikipedia.org/wiki/Associative_array The best thing to do is to call it exactly what the language or software you are referring to calls it. If Ansible wants you to create what it has named in their documentation as a dictionary in YAML, that's what you refer to it as. Otherwise, someone who is familiar with Ansible and it's documentation won't know what the hell you are talking about if you call it your own thing. I can agree with that point of view - YAML in the context of Ansible. https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html So you'd call it dictionaries then. And lists.
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  Availability Concepts - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ high availability availability • • steve  

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  I used to manage a Full Tolerance Infrastructure. 2 Devices of Everything (Routers, Firewalls, Edge Switches, Core Switches, Access Switches, etc) 2 Internet Providers 2 Private Circuits
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  Network Documentation - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification it career video training it training network+ documentation wiki • • steve  

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  Network Documentation is very very important, for Network Admins is a must, because for example a new team member joins, this information will be useful to acknowledge the network infrastructure.
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  WAN Services - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ wan • • steve  

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  I have experienced that T3 (DS3) collapses (saturates) once you reach 40 Mbps, even rate is up to 44 Mbps.
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  Copper Termination Standards - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ • • steve  

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  @scottalanmiller said in Copper Termination Standards - CompTIA Network+ N10-007 Prof. Messer: @jmoore said in Copper Termination Standards - CompTIA Network+ N10-007 Prof. Messer: @scottalanmiller said in Copper Termination Standards - CompTIA Network+ N10-007 Prof. Messer: But I'm literally 100% confident given your description, that you are perceiving it as people using "cell phones" to replace VoIP, and not realizing that it's standard VoIP softphones being deployed onto mobile computing devices that are often, but not required to be, cell phones. We have cisco everything and I was told it was too expensive to have softphones on our cell, we instead must have a separate cell phone. I doubt that, but who knows. And yet it wasn't too expensive to have Cisco... suspicious. yep, agree!
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  Common Ports - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer certification video training it career it training network+ ipv4 ipv6 upd tcp tcpip • • steve  

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  this is amazingly didactical... really enjoy this.
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  Network Termination Points - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer certification video training it career it training network+ • • steve  

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  @Pete-S Very true, in IT temporary becamos forever... that is a LAW!!!
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  Optical Fiber - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ • • steve  

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  @JaredBusch said in Optical Fiber - CompTIA Network+ N10-007 Prof. Messer: The point was that it is cheaper to buy pre-terminated fiber in the lengths needed instead of buying fiber and getting it terminated. Not that does not apply universally. It does apply for most office buildings. Where he is, I have random conversations with people who are like "Oh yeah, I trenched across town myself." Things you never hear here. There is actually a lot of self termination, lol.
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  Optical Fiber Connectors - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ fiber optic • • steve  

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  @melvinsilva said in Optical Fiber Connectors - CompTIA Network+ N10-007 Prof. Messer: @mary It depends on what you have, some Cisco Switches came with GBIC others (now in time) come with SPF. And now SFP+ (SPF is sunscreen levels, SFP/SFP+ are the adapters.)
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  Introduction to IP - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer video training it career it training network+ ipv4 ipv6 • • steve  

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  This video was a great introduction to networks. I like the description of the moving truck, it gives an image to start.
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  Copper Connectors - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ • • steve  

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  @JaredBusch This type of cable Im refering to.
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  Network Switching Overview - CompTIA Network+ N10-007 Prof Messer
  networking comptia prof messer certification video training it career it training network+ switch • • steve  

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  Worth noting that STP (Spanning Tree) is common in good switches, but it's also common to have switches that don't have it.
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  Copper Cabling - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ cabling • • steve  

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  In one of the companies that I worked, they have an "Initial Test" for any Engenier; They ask you, Are you an Engenier?, then do a Patch cord, here are the tools, make 1 with B Standard. That is the way to show that you are a good engenier... jajaja
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  An Overview of NTP - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification it career video training it training network+ ntp • • steve  

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  In network almost every core device (routers, switches and servers) may be NTP Master or Server. It depends on network design who will be the NTP Master, for me is the device which is "closest" to Internet.
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  IPv6 Subnet Masks - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ ipv6 subnet subnetting • • steve  

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  @Dashrender said in IPv6 Subnet Masks - CompTIA Network+ N10-007 Prof. Messer: It's absolutely true that IPv6 gives us billions and billions of small networks worth of IPs(each of those smalls being likely larger than the full IPv4) Right, both are just a flexible pool. One is just way, way bigger.
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  Network Topologies - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification it career video training it training network+ • • steve  

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  @scottalanmiller said in Network Topologies - CompTIA Network+ N10-007 Prof. Messer: @Dashrender said in Network Topologies - CompTIA Network+ N10-007 Prof. Messer: @mary said in Network Topologies - CompTIA Network+ N10-007 Prof. Messer: Did I understand him correctly saying there are still ring networks used by metropolitan areas? Resilient fiber networks frequently have two fibers - one going in each direction. It's often called a fiber ring. But should not be, that's not a ring. Yes, it is. Looks like this for example: Network topology is a ring. But it's still good ol' ethernet. I believe each blue line is a bidirectional link. So that each switch has two incoming links and two outgoing links. This type of topology is very common for a backbone where you have long distances. While a full mesh network is more resilient it requires a lot more fiber.
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  Assigning IPv6 Addresses - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ ipv6 • • steve  

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  Interesting.
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  Spanning Tree Protocol - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer video training it career it training network+ switching stp spanning tree protocol • • steve  

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  @melvinsilva said in Spanning Tree Protocol - CompTIA Network+ N10-007 Prof Messer: I had experience when "users" manipulate patch panel or switch and plug both end of the cable (patch cord) to the same switch, creating a physical loop, but STP blocks this and prevent network issues. Yeah, having switches that have STP turned on by default can be such a life saver in those situations. One place I worked liked to put in unmanaged switches all over the place. Caused me multiple long nights just tracking down which switch was the issue and then finding the loop cable. I knew exactly what was going on, finding it without good documentation and people saying "Oh, there's another network thingy over here." was just so much.... fun.
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  Prioritizing Traffic - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer video training it career it training network+ ipv4 ipv6 qos • • steve  

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  In big companies how use VoIP for production for example, this is a most, QoS needs to be very well deployed, to improve users/clients experience using the phone.
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  IGP and EGP - CompTIA Network+ N10-007
  youtube networking comptia prof messer certification video training it career it training network+ router routing egp igp • • steve  

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  @melvinsilva said in IGP and EGP - CompTIA Network+ N10-007: @scottalanmiller I Will Add; "Only by WAN Network Administrators". No, internal too. In fact, most, by far, are internal. You only have a few big WAN connections with most companies. But you might have hundreds or thousands of internal routes that have to be managed.
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  Dynamic Routing Protocols - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer certification it career video training it training network+ router routing dynamic routing • • steve  

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  @mary It depends of manufacturer or vendor. Now in this times everyone is using "Standard Protocols"
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  Static and Dynamic Routing - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer certification video training it career it training network+ router routing dynamic routing static routing • • steve  

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  Both required a good initial configuration, but when "issues" occurs like link flaps or ISP outage (when MPLS fails), Dynamic may affect Router performance (CPU, Memory, etc). Using Dynamic Routing; if you have no backup link or you dont have a proper failover configuration with correct threshold, the network updates will cause router performance degradation. It constantly will try to reach destination via default gateway. Using Static Routing; If you have not a recovery plan or a back door to enter the remote router, you will have zero access to that device until link or issue is restored. Packets will be forwarded to a dead route. For both, Initial design and configuration is the Key, when issues happens troubleshooting is a nightmare when things are not well done.
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  Protocol Data Units - CompTIA Network+ N10-007 Prof Messer
  networking comptia prof messer certification video training it career it training network+ • • steve  

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  @scottalanmiller said in Protocol Data Units - CompTIA Network+ N10-007 Prof Messer: @WrCombs said in Protocol Data Units - CompTIA Network+ N10-007 Prof Messer: Why would you not want to fragment a frame? Performance. Fragmentation takes time and effort. If you can avoid it, there is less work to be done and, all other things being equal, that means cheaper equipment going faster. Ah, That makes sense.
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  Introduction to Ethernet - CompTIA Network+ N10-007 Prof Messer
  networking comptia prof messer certification it career video training it training network+ ethernet • • steve  

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  Watched this one during lunch today, I thought This was a good way to explain Network behavor.
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  Understanding the OSI Model - CompTIA Network+ N10-007 Prof Messer
  youtube networking comptia prof messer video training it career it training network+ iso osi • • steve  

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  I'd like to think of "L3 switch" as being short for switch with layer 3 functions. Often they are used for routing traffic between VLANs. A router can do that as well but a L3 switch can usually do faster and on more ports at the same time. Typical is to have a bunch of L2 switches where the end points connect and then the L2 switches are uplinked to one L3 switch that takes care connecting the L2 switches together and do inter-VLAN routing. There are also L3 Lite switches (aka L2+) which are L2 switches with a limited L3 functionality like for instance static routing. L3 switches are usually the ones with the most features in all categories so sometimes you need to buy a L3 switch because you are after some other feature, like redundant power or what not. In small networks L3 switches are usually not needed. As an example Dell's PowerSwitches for instance are managed switches for building out the network to end points (campus). They are like this: N1100 series - L2 switch N1500 series - L3 Lite switch N2000, N3000 series - L3 switch They have the same OS and work the same but each step up in the series gives you more features and more speed and higher cost.
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  Training sites?
  • popester  

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  @popester said in Training sites?: Does anyone have a suggestion for, a website that would be comparable to Oreilly? Not necessarily looking for free. Nothing truly compares. The IT space has only a fraction of the resources of the dev space overall.
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  VIM refresher
  • popester  

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  Pluralsight Free Weekend
  • flaxking  

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  Cloud Services and Delivery Models - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer it career video training it training cloud computing network+ • • steve  

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  @mary said in Cloud Services and Delivery Models - CompTIA Network+ N10-007 Prof. Messer: At what point is it worth having your own data center? I would think the cost of it wouldn't be worth it for most. Your own, meaning you own the facility rather than colo? That one is pretty easy.... You would go to your own datacenter when the cost to get the features you need from colo exceeds the cost to build and maintain your own (this would likely happen at around 15-60% of filling a single colo location.) And your staffing needs will play into this, if the colo has 24x7 support, and you only need 16x6, you might lower your own cost that way. This is assuming you don't need the flexibility of putting equipment in and out from time to time or using multiple sites for it, like colo easily allows.
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  Wireless Network Technologies - CompTIA Network+ N10-007 Prof. Messer
  youtube networking comptia prof messer certification video training it career it training network+ wifi • • steve  

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  @mary said in Wireless Network Technologies - CompTIA Network+ N10-007 Prof. Messer: Do the frequencies used self modulate within the router? What I'm wondering is if when setting up a dsl connection if it automatically defaults to a specific frequency or is it constantly switching. DSL is the wired bit. Wifi is from the access point. And this will depend on the protocol chosen. 802.11 b for example requires thebfrequency be set.