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Questions tagged [internet]

For questions about interconnected networks.

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13 views

Issue disabling DHCP and preserving Internet connection [closed]

I have a problem with the router ASUS DSL-N16. Actually I want to pre-assign and IP to each device I have using the MAC of each device, no problem with this step. Now I put the IPv4, DNS and submask ...
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1answer
30 views

Pros and cons of the idea of parallell data transmission

I am learning the basics of internet protocols and related principles. I recently performed experiments comparing UDP and TCP. But when I did that (using the ttcp program) it was only one process and ...
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1answer
24 views

Ho to implement RPKI for our Network

I would want to implement RPKI in my network. I have gone through some documents by which i cant understand the implementation process. What are the steps i should follow to implement RPKI in my ...
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2answers
39 views

Using 2 different ISP In case one dies

It's my first ever post in here and I hope not the last. I'm looking for some advice. I'm trying to reduce my internet downtime for a local network. My setup. Mix and match computer environment (...
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3answers
224 views

What are the minimum requirements to be on the internet?

People often define the internet as a network of networks but this is wrong. If I connected two LANs together that wouldn't nesecarilly be on or part of the internet. In class we learned about ATM, ...
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0answers
19 views

Are there any other notable protocols besides IP on OSI layer 3 in the internet? [duplicate]

Are there any other notable protocols besides IP on OSI layer 3 used in the internet?
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2answers
6k views

Is it true that the fd00::/8 address range (ULA) in ipv6 is for machines that you NEVER want to speak with anything on the Internet?

Is it true that the fd00::/8 address space (User Local Addresses) in ipv6 is for machines that you NEVER want to speak with anything on the Internet? I was just reading that here and rather surprised ...
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0answers
16 views

Connect LAN port as internet to DSL-2750U [closed]

I want to use my router as a normal router by just using a LAN cable instead of WAN. The network is accessible to one of my computer via LAN(2 LAN cables, one I the one which provide internet and the ...
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1answer
56 views

Why Internet protocol is divided in rows?

In simple words, why IP packet is divided in rows each one is 32 bit in length? For example this attached image shows the IP packet has 32 bit in the first row then another 32 bit and so on. Is it ...
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2answers
40 views

How fast DNS Propagation can practically be? [closed]

I've found via web search how info (i.e. DNS name-IP number pairing) is updated on authoritative DNS servers: https://www.freecodecamp.org/news/understanding-the-domain-name-servers-46c6bcf9afa3/. ...
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0answers
50 views

What is UDP traffic on port 80 and 1024? [closed]

I am currently investigating a set of anonymized passive Internet traces from a monitor in New York. There I am seeing a lot of traffic on UDP ports 80 and 1024, and I was wondering what that could be....
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1answer
43 views

How cellular networks gets internet? [closed]

Mobiles get internet but how? From the towers, we used to get signals and communicate with others like calling or a message but coming to the internet how in the terms of networking terms like radio ...
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1answer
37 views

What happens if we try to access an IP Address that does no exist

Beginner Question: I just read an article talking about how the internet works and how routers make sure that packets arrive at the destination. However there is one thing that is not explained ...
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2answers
14k views

Do Bluetooth Devices have MAC address with the same specification as the MAC addresses of the Ethernet and Wi-Fi Network cards?

I recently found out that ZigBee devices have MAC addresses. ZigBee is more related to Bluetooth from what I know rather than Ethernet or Wi-Fi. Do Bluetooth devices such as phones, headphones, ...
2
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1answer
35 views

Bonding and switching between 2 different Links/WANs/Interfaces

Before I ask anything, I'd like to say that I pretty much searched a lot (to what I know of from keywords and terms such as "bonding" "wans" "links" "failover" "aggregate") and I couldn't find any up ...
5
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1answer
114 views

Analyze Network Traffic by Autonomous System Number?

I'm looking for the way to take an estimate consumptions toward internet per Autonomous System Number which could help me to make a decision if it's necessary to establish a peering with this AS's ...
-1
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1answer
43 views

MAc address or IP address? which one gets used from my pc to router? [duplicate]

Question 1) which one is used nowadays? NAT or PAT? Question 2) as I knew, when my pc requests some website, what happens is , the data(packets) from my pc go to router. then router makes the request ...
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0answers
65 views

Block internet on a Cisco catalyst 3560 port

Good day Is there a way to block a specific port in a Cisco Catalyst 3560 switch to block the user from accessing the internet but still have full access to the internal corporate resources. The ...
7
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2answers
962 views

How do routers on the backbone avoid IP address conflicts?

As the title suggests, how do ISPs, and other networks connected to the backbone ensure that their host network address isn't already in use by another backbone node, as there is no controlling device ...
0
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1answer
54 views

Estimating bandwidth requirements and productivity gain from traffic data

My small office has a 30Mbit/s internet connection, on which two or three people work. We could get twice the bandwidth at a substantial cost. I imagine a bandwidth upgrade would slightly improve ...
1
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2answers
141 views

What's the role of Default Gateway?

It acts as the "gateway" to the Internet,but also from what i have read,it's the last thing a packet would be sent to while trying to route (when checking the senders' route table). Maybe it's the ...
22
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6answers
6k views

What stops someone from configuring their network with IP addresses they do not own?

Here's the scenario. I was picturing a university that bought a range of IP addresses. I think they'd still be inside a ISP (right?), but they'd have freedom to configure stuff the way they wanted. ...
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8answers
6k views

Why are IP addresses given to each interface and not device? What would the implications of that be?

Why do we need to give IP addresses to each interface? Wouldn't giving one to each device be enough?
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2answers
5k views

Where in the TCP/IP stack does packet division and reassembly occur?

My understanding is that 1/ the Transport Layer in the TCP/IP stack creates packets for data that is being sent out, and 2/ the packets reassembly process occurs at the receiving end's Internet ...
2
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2answers
524 views

Is the real broadcasting on internet possible

Am sorry if my question is silly. But I want to clear that i doesn't mean just playing audio or video from a remote server.I am asking about conventional broadcasting as exists in Television and Radio ...
6
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1answer
4k views

Smallest IPv6 block advertised?

We've received a /48 allocation from ARIN, and want to advertise smaller blocks from different sites in our organization. I tried advertising a /56 from each site, but ISP is telling me they won't ...
2
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2answers
240 views

Are there limits to the number of global IPv6 multicast addresses in use at a time?

The address space for IPv6 multicast addresses is very large (something like 2^112) and so I'm imagining it might not be so hard to get my hands on a million or so of them at some point, and try using ...
1
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1answer
196 views

Using IPv6 for multihome ISP eBGP peering due to IPv4 public /24s no longer available

Problem: I have two routers, and two separate ISPs (two different public ASNs). I wish to accept full BGP routes in order for us to properly set up true reliable ISP failover in a way that allows ...
2
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2answers
2k views

Managing multiple internet connections to a single switch

We have 2 internet connections coming in to our building - neither are great (2 different routers from different providers). Are there technologies in Network Switches to support active switching or ...
6
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3answers
2k views

Need help understanding how packets travel across the internet

I've been learning about networks recently at a new job, and I did a presentation on what I've learnt so far. When I was describing the relationship between the datalink and network layer, I mentioned ...
4
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1answer
690 views

Cisco Router Setup 1841

I need some help. I am new to using Cisco routers (as far as setting them up my self), so forgive me if this is something simple that I am over looking or not understanding. I have a cable internet ...
9
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2answers
5k views

Are there any global network other than the Internet?

I found this definition of Global Networks: Currently does any Global Network exists (apart from Internet)? Can someone Quote some examples? Or non-global but on a country-wide scale(ATM network ...
0
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1answer
468 views

Download Internet Routing Table

What is the best way to download a snapshot of the Internet's IPv4 routing table? I need check if IP addresses are routable. It needs to function offline, so a looking glass server won't work. I know ...
3
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2answers
1k views

Why use T1, T3, OC3 in 2015? Why not just pull fiber?

I am currently looking to upgrade internet connections in our major offices. Given that our reliance on cloud services has grown, some users are complaining of sluggishly behavior. After testing, as ...
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2answers
93 views

Can large ISPs really offer 1Gb “dedicated” service to every home and business?

Hopefully this is on topic for this site. While researching synchronous carrier service, so called EDIA or Ethernet Dedicated Internet Access, to a rural location in New Hampshire, USA, I came across ...
2
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3answers
1k views

using fiberoptic for long-distance ethernet connection [closed]

I am trying to help provide decent (better than ATT's awful 3Mbps-on-a-good-day DSL) internet service to a cluster of homes in our rural neighborhood. The first house (near the main road) has good ...
1
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2answers
377 views

New crimped UTP cable connects and disconnects

I was just making new short UTP cables, and I was happy that when I checked the cable through an Ethernet Cable Tester, all 8 wires were straight to each other and was perfect. When I plugged the UTP ...
2
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1answer
151 views

Question about a switch

I'm planning a little network here and I'm not sure about one thing. Network structure is shown on the image below. ISP binds an IP to a MAC address, so if certain MAC is connected, it gets assigned ...
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2answers
1k views

UDP Sessions and Ephemeral Port Selection

I would like to ask community to help me finding answers to the following questions: According to RFC 6056 an operating system should pseudo-randomly select ephemeral ports for each transport layer ...
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1answer
53 views

In inter-domain routing, what methods can I used to specify the set of the ASes that will be traversed?

In RFC 4655, Page 5, the author wrote, "...the path of an inter-AS TE LSP may be computed using a PCE-based path computation model in some ASes, whereas the set of traversed ASes may be specified by ...
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1answer
202 views

Packet transfer from one host to another

I was reading about how a packet is send from one host to another. I am confused about entries that will be made in layer-3 switch routing table. Does it contain the entries for layer two switches or ...
8
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1answer
2k views

Internet Cable Has Been cut in two and taped back together

Let me explain, we have a two analogue lines (something like 16 pair each, the standard cable that's put into buildings) that come into our building but they pass through the building next door. ...
0
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1answer
216 views

In one organization having two ISP which configured on fortigate firewall ? How can we do the failover for internet?

Organisation don't have AS number .As of now we are doing manually route for any ISP at a time. when default Internet link is go down that time making second link enable on firewall. I saw the some ...
2
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3answers
93 views

How is traffic forwarded though IXPs if route servers do not forward any traffic

while i was studying about IXP route-servers, i read that they do not forward any traffic. I get that a route server is a "control plane" entity and it is used for easier bgp peering. However, i ...
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1answer
49 views

Multiple Networks on Sonicwall with no access to cisco firewall

The issue im having is that i have 2 networks with 2 internet connections. We now all of a sudden have a POS system handling our network. This system blocks our email and a bunch of pages we use. They ...
21
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2answers
9k views

Is multicast on the public internet possible? And if yes: How?

Is it possible to use multicast on the public internet? If yes: How? Are special IP addresses required and where do you get them from?
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2answers
839 views

Internet structure and ISP networks in detail

I am studying about internet structure, ISPs and their interconnection. However, I have trouble connecting some terms and understanding the greater infrastructure of internet in more detail. I will ...
13
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6answers
10k views

How does BGP work over TCP?

As far as I know we are using routing protocols to achieve Layer 3 connectivity, I am confused with the fact that BGP works over TCP which is L4. How can L4/TCP be established without prior L3 ...
1
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1answer
521 views

Are Protocols written in programming languages?

The protocols such as HTTP, IP, BGP are written in programming languages or simply plain English text ? If it is written in plain English, then how it is communicated with web browser, switches/...
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1answer
33 views

Are there any advantage of using multiple threads for a file upload, for an internet connected node? [closed]

I got asked in an intervew recently to design a file upload feature. After initial discussion, The interviewer asked if I can design for multiple threads. My thought was, As the network bandwidth is ...