Tag Info

Hot answers tagged

77

They are not the same. 127.0.0.1 is part of the 127/8 network which is reserved and points to the same computer. 0.0.0.0 is a special IP address that means different things depending on context. In the Internet Protocol Version 4, the address 0.0.0.0 is a non-routable meta-address used to designate an invalid, unknown or non-applicable target. To ...


73

I think generally routers serve as an access point, DHCP, firewall and switch as an easy solution for people who don't know much about networking No, routers are a separate kind of device from APs and switches. "Router" is not just a generic name – it describes a specific function, routing IP packets between networks. In other words, you're ...


48

what's the difference between 127.0.0.1 and 0.0.0.0? 127.0.0.1 is the loopback address (also known as localhost). 0.0.0.0 is a non-routable meta-address used to designate an invalid, unknown or non applicable target (a no particular address placeholder). In the context of a route entry, it usually means the default route. In the context of ...


11

I think Linux is much better to learn network administration. If you configure Linux networks, you have to know what you are doing, otherwise you won't get it work. With Windows you have a working network soon, but you don't know what you have done.... Just my two cent


7

It might be your router, but it might be your ISP: I have seen ISPs blocking all DNS (UDP 53) requests to other IPs than their DNSes - they do this to either monetize (make their DNS resolve ad-sites worng on purpose) or sometimes for legal reasons (DNS-based blocking of sites). And before you ask: Yes, they deliberately break DNS.


5

127.0.0.1 one of the adresses of local computer, but any adress 127.x.y.z also is another adress of the computer (called "loopback address"), except 127.0.0.0 (loopback subnet) and 127.255.255.255 (broadcast address for the loopback subnet). 127.x.y.z means "here". 0.0.0.0 is totaly different: 0.0.0.0 is not the adress of anything, it is the joker, as * in ...


4

Typically, a proxy server is located between you and the internet, like in the diagram below: In this case, the connection speed between your devices and your proxy server will be limited only by the local network speed (usually ethernet or wireless). The main bottleneck here will be the proxy's processor/RAM performance. This setup is not mandatory per ...


4

A home modem usually only gives you one IP address. The router does NAPT (Network Address Port Translation), allowing you to have multiple private IP addresses on your network. If your ISP gives you multiple IP addresses, you could possibly go without a router on your side.


4

Either "it depends" or "both". If you are heading into an industry that is very Windows centric or Linux centric then concentrate on that side, otherwise you are likely to encounter both and should understand at least the basics of both thoroughly. Which ever one you concentrate on, you will at some point have to interact with the other. With regard to ...


3

Linux is more widely used I'd say. Especially if you want to go big. Network is often bundled with Servers - and Servers usually run some kind of Linux. IMHO Linux is at least better in anything with developing because it allows you to tinker. - But that's just IMHO.


3

Because Ping is a broadcast-compatible service. A computer that receives such an echo request will happily reply.


3

Processes can communicate on TCP/IP between themselves locally, and that is especially true in Linux/Unix systems. You can use netstat and tcpdumpto figure out what's happening. netstat -s will show you statistics of internal processes but is very verbose. A nice way to see what's changing in to run watch netstat -s. Too bad watch is not included in OSX, ...


2

Typically you use bind-address 0.0.0.0 to allow connections from outside networks and sources. Many servers like MySQL typically bind to 127.0.0.1 allowing only loopback connections, requiring the admin to change it to 0.0.0.0 to enable outside connectivity.


2

Powerline is notoriously fincky about line noise. One of the ways it deals with a less than perfect connection is to slow down to try to actually get data through. Error correction and retransmissions reduce transmission speeds. Same thing happens with ethernet and crappy cables, or wireless (and essentially, homeplug is 'radio' with power cables as media ...


2

To see what systems are in the workgroup, from a command prompt you could issue the command net view /domain:workgroup where workgroup is the name of the workgroup. It doesn't matter that it is a workgroup rather than a domain, the command should still show the members of the workgroup. If you want to know the IP addresses associated with each name you see, ...


2

At your home you likely have only one path to take to reach the Internet, out through a device provided by your Internet Service Provider (ISP). The ISP needs a router at the other end of its connection to you, though, which can decide where data from your system goes next. Does it need to go to one of the ISP's web servers, one of its other customer's ...


2

the file works as an DNS server, it just resolve names CN to IP. If you use IP directly it doesn't do any resolve


2

First, know that the ceiling on the best PHY rate (Physical-layer rate: the basic signaling rate before protocol overhead) you can get is limited by how the capabilities of the client and AP overlap. Do they both support 802.11n or 802.11ac? Do they both support 40MHz- or 80MHz-wide channels? Do they both support 2 or 3 spatial streams? Do they both support ...


2

Use lower-case letters like this: 68:a8:6d:09:2a:d4


2

First of all if your computer is connectet to the internet it has some kind of public ip address (or at least you rounter and not your computer). This address is e.g 123.123.123.123. Depending on your ISP this address might change every time you disconnect and reconnect to the internet. Other computers on the internet can reach your Network or pc using this ...


2

The registry key: HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\<protocol>\UserChoice\Progid where is http, https, mapi, ftp etc) You will see that in my case FirefoxURL is my default for HTTP making Firefox my default browser for HTTP. Other browser records include: FirefoxURL (Firefox) ChromeHTML (Chrome) ...


2

Yes the "best" and "easiest" method of getting ESX information is with PowerShell and VMware vSphere PowerCLI. Basically PowerCLI adds cmdlts to PowerShell that allows you to query and retrieve information in your ESX farm. Check this link out for a getting started guide: Getting Started with VMware PowerCLI


2

Is it considered to be safe enough to enable ufw and deny all incoming connections when using an unknown network on a Ubuntu PC You should also consider that on an unknown network, it's possible that another system on that network could be monitoring all traffic that passes on the medium (much more likely with wireless than wired) and/or performing ...


2

Your internal "LAN" (through the gigabit switch) will communicate at gigabit speed, yes. Any device requests through the 10/100 switch will be limited to 10/100 - i.e. all Internet "requests". Your "Internet" traffic will be further limited by your Internet speed (c. 45mbps).


2

I had the same problem, do you have VPN software installed? I had an old Cisco VPN installation and I couldn't remove it under windows 10. To fix I had to revert the upgrade and uninstall the VPN then upgrade again. My revert only took a couple minutes, it's usually very fast. Open start menu and search for "windows 8" you will see a settings option to "Go ...


1

I had the same problem with network connections not showing up after the upgrade. The issue is with Cisco VPN software client. uninstalling it in windows 10 won't fix the issue. The solution here is to do the following: Revert back to windows 8.1 (recovery options > revert to windows 8.1), next After restore of windows 8.1, go to programs and features > ...


1

I do not have the points to comment so i have answered instead. I had the same trouble and for me @TechnoCore answer worked like a charm! But later when Windows 10 was up and running with wifi connected correctly I needed to install Cisco VPN Client (version 5.0.07.0440). Cisco VPN Client did not install. I lost some hours finding a solution but i found ...


1

Getting your network connections back I had the same problem on a Lenovo Yoga 2 Pro. I got my network devices by running the following in an Administrator command prompt: netcfg -s n reg delete HKCR\CLSID\{988248f3-a1ad-49bf-9170-676cbbc36ba3} /va /f netcfg -v -u dni_dne It has to do with the legacy Cisco VPN client: We believe in cases where there ...


1

I had this exact issue as it would not get an IP address. After trying to remove re-adding, assigning manual IP, I googled and found this and it worked: Press the Windows Key + X together and select Command Prompt (admin). Type the following commands and hit Enter after each: netsh winsock reset catalog (reset winsock entries) netsh int ip reset ...


1

So it sounds as if you've answered your own question: ether proto 0x88b5 and ether[14:2] == 0x4143 and ether[16:1] == 0x4b ...if, that is, you're looking for "ACK" in the first three bytes of the packet. If you're looking for "ASK", that'd be ether proto 0x88b5 and ether[14:2] == 0x4153 and ether[16:1] == 0x4b But the number of bytes doesn't have to ...



Only top voted, non community-wiki answers of a minimum length are eligible