Comments by "Javier Flores" (@JJFlores197) on "let’s subnet your home network // You SUCK at subnetting // EP 6" video.

  1. In the same concept as the IOT stuff, you can setup a guest network so that if you have guests over and don't want to give them your wifi password, you can create a new wifi just for guests (along with a new subnet/VLAN) and they will have no access to any of your devices on your main network.
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  2. Not in the slightest. This series is far from complete. There are many topics he hasn't gone over or if he did, it was very brief. He hasn't even shown you how to configure a Cisco router and a switch. He's a good and enthusiastic presenter, but lacks a lot of important Cisco-spcific information. I would watch David Bombal or Jeremy's IT Lab. They may not be as exciting or energetic as NWC, but they are far more informative, and most importantly, complete. This series, in its current state, is ok if you want to have a high-level overview of general networking knowledge, but it is not even close to what you need to know for the actual certification.
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  3. This is done at the router level. You will need to create different networks for whichever subnets you want to create. I don't think most typical home routers let you do this, or if they can, it is very basic.
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  4. He goes over that at 2:30
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  5. That's an ambiguous question as it depends entirely on the capabilities of your ISP equipment. Yes, no or maybe. You'll have to read the documentation and settings to see what you can/can't do. In general, most ISP stuff is pretty limited.
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  6. No.
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  7. No... this has nothing to do with command prompt.
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  8. What exactly do you mean by that? Did you create a Windows Active Directory domain environment? Need more details.
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  9. You'll need to read the documentation for your router. Most typical home routers don't give you that much control so your options may be limited.
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  10. Port forward the necessary ports for your game, setup UPnP (if supported by your router), or set your PS5 on a DMZ. The 1st is preferred for security.
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  11.  @rgrahamdesign  You use subnets and VLANs to create separate networks for different uses. For instance, in an office setting, you may use a few VLANs: Staff network, VOIP network, Guest network, management network. All of these networks can run on the same hardware so that you don't have to buy dedicated routers and switches just for your staff network, then dedicated switches for your guest network, etc. You setup your subnets and VLANs on the router and switches so that the correct traffic flows through the correct ports and networks. A router is needed for VLANs to talk to other VLANs. You can then create firewall rules to prevent certain subnets from talking to each other. For instance, you want to be able to provide guests with wifi access. However you don't want the guest network to be able to talk to your servers or other networks for security reasons. At the firewall level, you can create a rule that prevents any traffic from the guest VLAN to communicate with any other network and just have a connection to the internet for instance.
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  12. No. Its the last IP address of the subnet that is the broadcast IP. The first IP is the network ID.
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  13. Subnets are used to breakup a large network into smaller sub-networks (hence the term subnet) for better and easier management. Say you have a school district with 20 sites (15 schools and 5 administrative sites) and a total of about 20k endpoints (computers, laptops, VOIP phones, interactive screens, etc). How would you approach the network setup? Do you put everyone on the same network? That wouldn't be a good idea from a management perspective. You would breakup the network into smaller chunks. You would create a student subnet/VLAN, then a staff subnet/VLAN, then a guest VLAN, a server/IT infrastructure subnet/VLAN, etc.
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  14.  @sierrawilson5605  I don't believe they can. The idea is they are separate networks that are independent of each other. You can, however, setup routing that allows communication across VLANs and subnets.
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  15. You won't need to do subnetting for the A+. Maybe for Net+, but not for A+
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  16. I'm not 100% sure, but I believe you would be able to use a single router for all of your subnets. Your router will need as many physical interfaces as you have subnets. Each subnet would need its own switch. In the IT world, you wouldn't really do it this way. You would create subnets and VLANs. This way, you don't have to buy switches for every single subnet. Enterprise switches can be expensive. You can configure x amount of ports on a switch for each VLAN. Where I work, we have at least 4 VLANs: VOIP, Staff, Student, and Cameras. Each of our cabinets has at least 1 switch per wing of classrooms that all connect to our main cabinet (MDF) via fiber optic links. The exact layout depends on how you setup your network.
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  17. You can setup a DHCP server for each subnet/vlan. It gets a bit more complex, though.
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  18. My suggestion is to read the online documentation for that router. Its unlikely he's going to make a video just for that router.
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  19. What specific part of the video are you asking about?
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  20. That's kind of true. IF you have a smaller subnet, you have less available hosts which can potentially limit unnecessary and/or suspicious devices. In reality we use subnets to break networks down into smaller sections to make more efficient use of IP space.
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  21. You don't. There is no Apple Silicon version of VirtualBox.
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  22. You'll need to convert both the IP and subnet mask to binary. Then you will need to perform a logical operation called "ANDing". In short, if each bit in the IP and subnet mask are the same, you write down that number: ie 1 & 1 = 1; 0 & 0 = 0 If the numbers don't match, then you write a 0. Once you finish, you will get the IP in binary. Convert it back to decimal and you should get 172.16.45.12 which is the network address. IP: 10101100 00010000 00101101 00000111 SN: 11111111 11111111 11111111 11111100 10101100 00010000 00101101 00000100 172.16.45
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  23. Depends on the router in question. Most home routers have pretty limited features when it comes to advanced networking. There are plenty of guides on how to create sub-nets and programming them into routers.
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  24. He can't create a universal guide dude. Not everyone's home router supports this stuff, or if it does, it may be very limited. This is more of "theory" video of how subnets work.
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  25. Whether or not your router supports it depends on it. Typical home routers have limited advanced features. If you have IOT devices, you can create a new network just for them. That means that the devices will have no idea that other devices in other networks (like your main network) exist. You can setup a guest wifi network. When you have guests over, instead of giving them access to your home network, just give them the wifi password to the guest network and thy won't be able to see your other devices. Helpful if they happen to bring a potentially infected computer and not realize it.
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  26.  @TUFFOURDAILY  Its still unclear. Do you want to join PCs to your Windows domain environment? If so, they will need to be on the same network as your domain controller. If you need to have PCs on your domain that are outside of your network, you will need a VPN server setup.
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  27. As he said, you count the bits for the CIDR notation. That long string of 1's are bits. If you count them, that's how he got /26
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  28. You will need to look at what options you have on your router regarding subnets. A lot of home routers don't have many options and others do give you a lot. You'll need to create a 2nd network and assign its IP address. You will need to configure things like DNS, DHCP, default gateway, etc. Then you'll need to setup interfaces on the router so that they're a part of that 2nd network. This may involve using managed layer 2 switches to create VLANs.
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  29. Nope. Its not complete. Too much info still missing.
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  30. I get what you're saying, but it is not feasible for him to create a universal guide that works on every single router known to mankind. Typical home routers are feature limited compared to higher end business routers so you may not even be able to create subnets. You'll need to look for a guide for your specific router. Once you know the theory, you can start learning the practical aspect of it on your own hardware.
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  31. Its per network.
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  32. That's where it depends on the router in question. Usually if you can setup VLANs on your router, you should be able to create firewall rules to allow/disallow inter-vlan communication.
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  33. If you have different VLANs, you have create the VLAN interfaces on your router. How you do this depends on your router. Most typical home routers have no support or very limited support for custom VLANs.
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  34. Yes. You typically setup VLANs on your APs that point to your subnets. You can create different SSIDs (wifi network names) for your different subnets or you can get more advanced and create automatic VLAN assignment.
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  35. Yes, you can use DHCP. However, you will need to configure your DHCP server to work across the different subnets. How you do this depends on the DHCP server/router you have and its configuration settings.
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  36.  @xMhmDhD  Can you try one at a time? Disable DMZ and just port forward. Does that improve anything? Then disable port forwarding and set your PS5 in the DMZ and see if that improves anything.
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  37. That depends on your router. Typical home routers have limited settings when it comes to creating different subnets/VLANs. its not feasible for him to create a guide that works on every single router.
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  38.  @mansart26  I'm pretty sure it means hosts per network.
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  39. He says it right a 5:09: counting all the network bits. Remember, IPv4 addresses are 32 bit addresses divided in to 4 octets. Each octet has 8 bits.
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  40. We don't really use IP classes anymore. Its more efficient to create subnets as necessary. IPv6 is not very popular from what I can tell in the business world.
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  41. VLANs are a layer 2 concept and subnets are a layer 3 concept. In networks, you use both VLANs and subnets together.
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  42. Depends on the router in question. Typically, home routers are pretty limited when it comes to do advanced network configuration so you may or may not be able to do it, and if you can, it may be limited. If you have a supported router, you can usually flash a 3rd party firmware like Tomato (odd name) or DD-WRT. These are pretty good alternatives to stock firmware and have many more options that most home routers have.
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  43. 1. You would usually setup firewall rules to prevent the different networks from talking to each other. 2. You setup your DHCP server to work across different VLANs 3. You usually use subnets and VLANs in conjunction.
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  44. It depends on your router. It isn't possible for him to create a universal video guide as not all routers have all settings. Typical home routers are limited when it comes to advanced networking, but some do have the necessary options. You'll need to look around your router's settings to see what is available for your device.
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  45. The router allows subnets to communicate w/ each other.
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