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Questions tagged [isp]

An Internet service provider (ISP) is an organization that provides access to the Internet.

An Internet service provider (ISP) is an organization that provides access to the Internet.

Internet service providers can be either community-owned and non-profit, or privately owned and for-profit.

Access ISPs directly connect clients to the Internet using copper wires, wireless or fiber-optic connections. Hosting ISPs lease server space for smaller businesses and other people (colocation). Transit ISPs provide large amounts of bandwidth for connecting hosting ISPs to access ISPs.

There are 3 tiers:

  • Tier 1: a tier 1 network is one that can reach every other network on the Internet without purchasing IP transit or paying settlements.
  • Tier 2: a tier that can access some part of the network without paying transit
  • Tier 3: only uses transit

Source wikipedia

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How do ISPs calculate bandwidth?

I mean, is 100 GB per month 100 * 1000^3 bytes or 100 * 1024^3 bytes? Wondering if they use the decimal definition like HDD manufacturers or the binary definition. I do know that there's technically Gibibyte (GiB) for binary but it's not commonly…
Jack
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Questions and opinions of a Cable line with a back-up T1

My company currently has only a Covad T1 that connects the main office to the internet. This line is mainly for our billing office (located across the state) to connect to us for our Terminal Server. Our future plans for our main office include…
Tablemaker
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How to tell if a router traffic shapes?

I have a client in a managed office, and part of that service is the provision of internet, with static IPs for all desktops provided by the building, (I know it's a recipe to have all your data stolen, and you not even know!). They insist on saying…
Mister IT Guru
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How do an ISP's DNS servers resolve a local hostname?

This might be a stupid easy question for some of you, but I couldn't find a fast, accurate answer online. I had a problem recently where I was trying to SSH to a local FreeBSD server, but the connection was refused. The hosts.allow file on the…
Will
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2 ISPs into ASA 5510 (base license) and separate traffic by protocol (port). Is it Possible?

I've been tasked with setting up our ASA to allow traffic from two ISPs. Currently, ISP1 is for mail, VPN, Remote Web Workplace (SBS 2003), and internet. My boss would like me to set up the DMZ interface to accept HTTP traffic and direct it to a…
fourleggedfish
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Google DNS Geolocation Issue

I work on a ISP in Africa. Our customers were being redirected to Google cache in South Africa. Apparently with no reason, they start being redirected to Google US, which for us has higher latencies (avg: 400 ms). How can I contact Google to fix…
Andre
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Is it possible to use 2 lines from 2 different ISP?

How can I (if it is possible) to set up the network gateway if I have 2 internet lines from 2 different ISPs? Furthermore, one of them is forwarding /28 static ip for (into) our network. Is there a schematic diagram to refer to? Thanks.
Jake
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What ISP Do Webhosts Use?

What ISPs do the servers used to host large scale websites or companies go with? Or are they somehow directly connected to the internet?
Ell
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Windows Updates mirror for ISPs

I work in a ISP where bandwidth is limited. We want to provide our customers a mirror for windows updates, so we can save bandwidth and provide to our customers a faster connection. How can we achieve this?
Andre
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Are some IP addresses more 'accepted' than others?

I'm from Argentina and I know that some ISP, such as hotmail or other sites, block emails going out from our IP addresses, so now I bought a VPS in the US (from slicehost) with a fixed ip just for me and I want to know if for being a US IP will I…
Gabriel Sosa
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How to retrieve the IP Address Assigned to the machine by ISP

my question is regarding the IP Address assigned to a machine, whenever we go to any site which reveal our IP Address, they display a number which is assigned to the machine through which we are accessing the Internet, i want to know how is it…
Gunwant Saini
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Client can't reach my production webserver. It's their ISP's fault, but now what?

I have a customer in Michigan who can't access my production SaaS webserver that is hosted on Slicehost. All other companies across the US/Canada/Europe have no problem reaching the site. This problem is occuring intermittantly, and Slicehost…
MikeN
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Opensource Dns based incoming Load balancing?

I am using Linkproof device for incoming load balancing based on which is based on dns. For example my linkprrof have 3 isp link.... it also act as a dns sevrer for my sites...so when someone connect me by using my dns name my linkprrof give them ip…
sahil
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How do you ensure that two data network links have no SPOF?

How do you ensure that two data network links have no SPOF (Single Point of Failure)? We are working on a datacenter network connectivity and need to ensure that there will be no SPOF. We will have two network links to connect to the data…
Steven
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Computers in our office network occasionally can't visit certain websites until we run a tracert. Why?

Our office network is split into 2 internet service providers so that we have failsafe connections to the internet. These 2 gateways occasionally go down on certain computers, and this causes those users to no longer access certain websites (eg our…
digiguru
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