Questions tagged [internet]
For questions about interconnected networks.
310
questions
0
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0answers
11 views
Is it reasonable to believe CloudFlare WARP works? [closed]
CloudFlare WARP allegedly replaces TCP with an algorithm they claim is more appropriate for modern Internet (attempting to determine whether packet loss is due to network being overloaded or due to ...
1
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0answers
21 views
How to create an internet protocol like HTTPS? [closed]
If I want to create my own internet protocol, what should I do? How can I create it?
Will people be able to use my protocol in their internet browsers? I asked this question in a simple Discord server ...
1
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1answer
58 views
Does UDP's lack of congestion control clog up the Internet?
I'm reading Computer Networking: A Top-Down Approach, and from what I understand, UDP has no widely adopted mechanism for congestion control like TCP does. Isn't this a problem for the Internet as a ...
6
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2answers
1k views
Is a point-to-point T1 line literally a line in real life?
In Packet Tracer this is how we draw a WAN link, or a T1 link:
Does the "red line" here literally means there is a single cable connecting the two routers in real life?
If no, then what are ...
2
votes
3answers
49 views
Where is CSMA protocol really implemented?
I have multiple questions.
Where is/were CSMA protocol really implemented ? i.e In our computer ? routers ? switch ? or which component ? is is s/w or h/w based ?
Is it still used ? if not, which ...
1
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2answers
43 views
How do machines setup a route in a network?
So I have been reading a bit about networking, and I am a bit confused about what exactly happens after domain name resolutions.
Lets say I do a get request to "some.website.com". First, my ...
-1
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1answer
28 views
Why is Cisco router PPPoE client configuration so complicated? [closed]
In some routers like Ubiquiti's UniFi Security Gateway, when you want to connect to internet via PPPoE, all you have to do is go to the web GUI or controller, go to WAN settings, hit the dropdown ...
0
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2answers
62 views
Why are ISPs arranged in hierarchies?
ISPs are organised in a hierarchy where the Tier 3 ISPs are connected to Tier 2, and Tier 2 ISPs are connected to Tier 1 ISPs. Why are they organised in a hierarchy? Is it because if all devices were ...
0
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1answer
25 views
What are MMMM, PROG in datagram Options/Security?
In RFC 791 (Internet Protocol Specification), I came across the Security field in Options:
Security (S field): 16 bits
Specifies one of 16 levels of security (eight of which are
...
0
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1answer
42 views
How routers route packets to a specific network
As I understand it, routers route packets to a specific network based on network id and of course the network id must be unique on the Internet, now the question is: maybe there are billions of ...
1
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0answers
14 views
Data transmission to servers [closed]
How is a data packet transmitted from my PC to the google.com server? I would like to know through what nodes it travels. Thanks in advance!
0
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3answers
79 views
How are MPLS routers connected to each other?
So MPLS is one of the many ways to connect two or more distant sites. In other words, it is some kind of a "WAN solution".
But what is the "WAN solution" for MPLS?
Take for example ...
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1answer
28 views
Is this how ATM and SONET work?
This is how I visualize how SONET carry ATM, and how ATM carry IP:
Is my visualization correct?
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1answer
39 views
What is the maximum number of networks in IPv4?
From my understanding, in IPv4 addressing, the first 2 octets identify the network, meaning 2^16 networks can exist. But that doesn't seem even closly enough as the population in even USA is above 300 ...
1
vote
1answer
92 views
Why do we need ATM if SONET/SDH can carry IP directly?
If SONET/SDH can carry IP, and ATM rides on SONET/SDH, then why do we need to encapsulate IP inside ATM?
That makes "IP over ATM over SONET/SDH". What's its benifit over "IP over SONET/...
0
votes
1answer
55 views
Is ATM a Wide Area Network?
Is Asynchronous Transfer Mode a wide area network? Or is it just a framing protocol?
What I mean by wide area network is that, if there is such a thing called "ATM provider", does it mean ...
5
votes
1answer
43 views
IS Network automation kills carries of network Engineers? [closed]
Iam working as network engineer since long time and i enjoying working same . But now i am afraid after listening of network automation .Is network automation kills jobs of network engineer across ...
0
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2answers
76 views
Where are ATM switches located in real life?
Consider the following diagram from this link:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bbdsl/configuration/xe-3s/bba-xe-3s-book/bba-ppoe-atm-xe.html
If I am correct, here's how I see it ...
1
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1answer
398 views
What is “TIME_WAIT” connection in a TCP connection and what is it's purpose?
I am requesting a webpage running on local server port 8080 and was expecting one connection to be established between the server (port 8080) and client (random port). But one additional port is also ...
1
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2answers
57 views
2 AS in the same box JunOS
Today we have an MX204 and we announced our AS using Juniper, but we also have partnership with another internet provider that has another AS. This other AS has much less client and a much smaller ...
-3
votes
3answers
143 views
Why is the Internet not hierarchically addressed? [duplicate]
IANA is recognized as an authority on global IP address allocation. See Wikipedia, or ietf.org, IANAs website, or Google it. They state that "both IPv4 and IPv6 addresses are generally assigned ...
2
votes
3answers
76 views
Routing with private addresses
Let's say that we have a private network, with private addresses and a NAT enabled router at the end. If the router is misconfigured and routes traffic to the global internet, keeping as source ...
1
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2answers
69 views
What role is ARP playing for a internet request?
For me it is not clear how the internet is working. Let's say we have host (local IP:192.168.12) and the gateway/router (local IP: 192.168.0.1 / extern IP: 62.1.2.134)
Now the client (192.168.0.12) ...
0
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2answers
509 views
Is not 192.168.88.1 (192.168.*.*) always an “internal” IP address?
I had some headache with a proxy setup which I couldn't figure out. Turns out that only "127.0.0.1" and "localhost" were recognized as "localhost" or "internal" ...
0
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2answers
44 views
What is an acceptable loss with external networks? [closed]
Based on my reading here, any traffic loss on the internal network should be quickly addressed. However what is an acceptable level of loss one can expect when communicating with external networks? ...
0
votes
1answer
29 views
Why does SONET need atomic clock but T-carrier does not?
SONET and T-carrier are both synchronous TDM.
But T-carrier does not use atomic clock. Why does SONET?
Is it because SONET does not use buffer? But how does it prevent bit loss if there is no ...
0
votes
1answer
233 views
Why is the IPv6 address I'm getting from whatismyipaddress.com wrong? [duplicate]
So I've portforwarded my machine using the graphical interface provided by my router. This interface also gives me a public IPv6 which I can use to communicate with my machine through the internet. ...
0
votes
1answer
492 views
Vxlan with internet access - possible because of high MTU?
So i was wondering, because VXlan requeres a high mtu to work properly (some set it even as high as the max configurable MTU (9000ish)), how would providing internet access for these nodes/servers ...
0
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0answers
23 views
Real world IP routing on the Internet [duplicate]
I used to think the Internet looks like a tree, with some extra edges for redundancy. And that the subnets are getting shorter and shorter as you go up towards the backbones, the roots of the "...
0
votes
1answer
385 views
Automatic backup internet connection, is it possible? [closed]
I am trying by best to understand this topic. Apologies if this isn't the correct format or if it's lacking required information, I am little more than a home user. If someone could help point me in ...
0
votes
3answers
214 views
What is the relationship between an ISP and an AS?
Can one AS unite several ISPs, can/does an ISP own several ASes? No matter what I read nobody really clarifies this relationship or at least doesn't writes it down. Or is ISP and AS just a synonym? Is ...
0
votes
1answer
64 views
filling routing table with next hop addresses
in a multi hop network when the packet leaves the source is it loaded with all the ips of the stops on its journey, then at each hop it checks the bitmask with the nodes routing table to see if this ...
0
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2answers
26 views
Speed comparison between agregated and non agregated internet
I have an offer for internet connection, where they offer me these speeds for a symetric and non aggregated connections over fiber optics (upload/download):
10/10 Mbit/s
20/20 Mbit/s
30/30 Mbit/s
...
0
votes
1answer
24 views
Peer-to-Peer (P2P) Networking Decentralization [closed]
How does P2P networking locate peers in the network if there is no centralized point to look up IP addresses of the individual computers in the network. Assuming there was no domain to use to do an ...
0
votes
1answer
19 views
Why can I forward email without mx record set up properly? [closed]
Say I have a domain
domain.com
I do not set anything on mx record in domain.com
Yet I can set a forwarder from say hello@domain.com to another email.
I set a address.
Is this normal?
0
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2answers
29 views
How could I build a Inner-Net of multiple networks?
I have multiple theoretical(not at the time being) WiFi Networks with one on each property(3 properties) and I want to have the three networks connected similarly to the internet. For example, I would ...
6
votes
2answers
284 views
Can you become your own ISP?
How exactly does an ISP connect you to the vast network of computers which is the internet?
In my area there are several ISP's. For example. Bell, Rogers, and Cogeco all connect you to the "same ...
0
votes
1answer
53 views
Does Internet Stream Protocol (IP version 5) work on the Internet?
IP with version number 5 is dedicated to the Internet Stream Protocol. Can you send such a packet on the internet at large, or will it be blocked/discarded?
1
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2answers
2k views
Cisco nexus CRC error on interface
I have dual stack vPC setup between 4 cisco nexus switch as per above design. I have noticed recently that getting CRC error on cisco 3064 all 4 interface connected to N9K, and during peak traffic ...
16
votes
3answers
3k views
Is it possible to specify a route for a packet to take?
So, AFAIK, packets "hop" between routers. Packets are forwarded via a router's default path until it gets to destination IP. So is it possible to specify a specific set of routers this packet "hops" ...
0
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2answers
82 views
Are the submarine cables used only for internet?
We can see that almost all of the servers are interconnected between each others using submarine cables which ends in a complete hierarchy but question is are those internet connected cables are used ...
0
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1answer
394 views
Secure MPLS configuration: Does TCP port 646 (LDP) need to be generally exposed?
I am looking for expertise on MPLS configurations and security. A recent Nmap scan of my organization's public IPv4 perimeter networks has discovered a system which appears to be listening on TCP port ...
0
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1answer
45 views
Reccomended set up for wifi in dense apartment block? [closed]
I live in an apartment block of 87 units & one thing most people in it complain about is the poor cellular data reception.
I have an idea of installing a fast wifi internet connection ...
1
vote
1answer
311 views
Confusion about TCP/IP data flow in layers
I'm confused about how the data flows through the layers of the TCP/IP model, so I'll just tell what I think it happens (using an email example) and I'd appreciate if you can point my mistakes.
...
2
votes
2answers
122 views
Is the Internet essentially a network of routers?
Is the Internet nothing but a globally scattered interconnected routers, and that the connections between them could be via any of Leased Line, X.25, Frame Relay, ATM, MPLS, or Ethernet?
0
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2answers
250 views
How are X.25/Frame Relay/ATM/MPLS related to PSTN?
Do X.25/Frame Relay/ATM/MPLS have their own isolated physical infrastructure? Or are they technologies invented to utilize the then existing infrastructure of the PSTN?
0
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1answer
48 views
Is there any decentralized network of any kind in actual use? [duplicate]
I've spent a lot of time trying everything I've ever found which is decentralized. Every single such network has always been a ghost town; a complete waste of time, pointless to attempt to use with ...
1
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2answers
491 views
Losing connectivity after creating a VLAN other than the default VLAN
I have a 192.168.0.0/24 network that serves three computers. There are no issues with this part of the existing network.
I have purchased a new Cisco SG350-28P 28-Port Gigabit PoE Managed Switch.
I ...
1
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0answers
21 views
How can I block the Internet and mobile data fallback? [closed]
Hoping to block outgoing WAN access from my network during certain periods as well as stopping mobile devices from auto-failing-over to their mobile data. Of course this won't be perfect since devices ...
1
vote
2answers
126 views
Modems involved in dial-up connection
I am currently studying the textbook Computer Networking -- A Top-Down Approach (7th Edition) by Kurose and Ross. In a chapter on Home Access: DSL, Cable, FTTH, Dial-Up, and Satellite, the authors ...
