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Questions tagged [network]

For questions about Networking that includes design, and use of a network, the physical cabling, hub, bridge, switch, router, and so forth. Anything in relation to networking and its technologies.

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Can router give the same public IP to 2 different networks? [closed]

I have set up a virtual machine and specified an IP address for it that is outside my home network. I cannot ping this machine and access it through the Internet from my host machine. I presume it is ...
Sgg8's user avatar
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1 vote
1 answer
168 views

Understanding IPv4 model of operation

I'm new to networking and reading RFC791 about IP protocol specification and got some question regarding the paragraph 2.2 Model of Operation. Here is what is discribed: The internet module prepares a ...
Some Name's user avatar
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0 answers
14 views

Debug slow home network [closed]

I don't know how to approach this problem. The TL;DR is that my internal home network is "slow". Here is the setup: I live in the UK. I have a Sky ER115 router Directly plugged into the ...
JPFrancoia's user avatar
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26 views

VPN compatible with China's firewall [closed]

Some of my colleagues are working from China and we are looking for a compatible VPN provider for my colleagues. The requirement is to connect to the servers in public cloud providers Access the ...
Nitesh B.'s user avatar
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1 answer
23 views

Recognizing the next protocol in MPLS header

How can I know what is the next protocol in MPLS header? I do know that MPLS header does not provide any information about the next protocol, But I somehow need to know how to recognize it, as I am ...
user89902's user avatar
0 votes
2 answers
17 views

link between firewalls and cpe internet dedicated or on internal vlan

We have 2x datacenters in which we have 2x firewalls and 2x internet routers. to allow the firewalls to reach both the internet routers there is a dedicated line between the datacenters For budget ...
Comsulta's user avatar
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3 answers
81 views

If all subnets are a part of same vlan, then the network segregation using subnets does not make sense

This is what we know about subnetting. By dividing a network into subnets, you can separate different departments, locations, or security zones, creating distinct broadcast domains. This segmentation ...
RRHS's user avatar
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2 answers
41 views

Unsure about our current setup + routing issues (Diagram attached) [closed]

I work for a medium sized company, we have around 52 computers. The company grew quite a few times meaning switches were bought and attached to meet the demand of new employees/machines. To sumarize, ...
gistix's user avatar
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1 answer
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Access multiple networks via one managed switch

We have a kind of granulated network structure. At the moment I have two network adapter connected to my system for two of the network areas. The Systems in network A and network B should not ...
MaKaNu's user avatar
  • 101
0 votes
1 answer
36 views

Cannot enable link. Why?

I have the following setup: I'm unable to enable Fa0/5. The switch configuration for that port is correct No configuration has been made on the server side: Assigning Ip adresses has not solved the ...
Rubus's user avatar
  • 295
1 vote
1 answer
43 views

Understanding the Role of Member Device in Cisco 3850 VSS Stack

Clarifying the Role of Member Device in VSS Domain Configuration I am trying to understand the role of a device in a VSS domain as a "member." What does it mean for a device to be a member? ...
Глеб Щеголев's user avatar
2 votes
1 answer
122 views

Do Directly Connected Routers Need Routing Protocols For DHCP Relay To Work?

Let us say that we have R01, R02, and R03 connected to each other, and each of them is connected to a different subnet SUB01, SUB02, and SUB03, respectively. R03 is set up as a DHCP server, and DHCP ...
Shadi's user avatar
  • 253
1 vote
1 answer
75 views

Why No Ping When Use Static and RIP in This Network?

I am a learner. I learned somewhere that we could use static and dynamic routing in the network. I built the simple network shown in the attached picture. I configured router8 with static routes to ...
Shadi's user avatar
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1 vote
1 answer
42 views

In what situations is MPLS label erased from the top of the label stack in MPLS?

What are other processes that MPLS/IP routers can do with, or to MPLS label stack?
Vladimir Pejanovic's user avatar
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How is Control plain in MPLS used for creating label table, and IP routing table?

How is Control plain in MPLS used for creating and maintaining label table, and hold protocols for creating and maintaining IP routing table? Is IP routing table in MPLS located in Customer edge ...
Vladimir Pejanovic's user avatar
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1 answer
14 views

How can GMPLS unify signalization plain of all telecommunications network technologies?

In what way can GMPLS do that unification of signalization of network technologies, by hardware, like MPLS switches, or by network protocols? And what is the role of optical networks in GMPLS? Are ...
Vladimir Pejanovic's user avatar
2 votes
1 answer
52 views

6125XLG blade switch IRF configuration in c7000 chassis

I have HPE c7000 chassis with 612XLG switches. I am trying to setup IRF between blades switches. somehow i am not able to bring up irf-port interface. In 6125XGL TE1/0/17-20 ports are internal ...
Satish's user avatar
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Is is possible to create a network using supernetting like this? [duplicate]

I need to create a network in the range 200.1.x.x and split it into 3 LANs which consist of 1250, 1750, and 1500 hosts respectively. This network should be able to expand to a total of 56 networks. ...
Tina's user avatar
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1 answer
90 views

Multiple GRE tunnels towards single host using anycast IP

I'm trying to build the following network architecture: Where clients try to connect to a backend server (e.g. SSH) by using a Public Anycast IP adddress (1.2.3.4), that routes the client to the ...
John's user avatar
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0 answers
11 views

Routing vs Forwarding [duplicate]

What is the difference between routing and forwarding?When the network is a packet transfer network I dont see the reason for routing since forwarding a packet between nodes requires a routing ...
Volpina's user avatar
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1 answer
95 views

What is PPP and why does it not have a MAC address?

I just wanted clarification on what exactly PPP is and why it does not have a MAC address due to having seen that under a response to a question of how routers transverse packets to their destinations....
N.C.'s user avatar
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3 answers
179 views

Finding what interface a MAC address is assigned to

I am currently on a Cisco 9410 and I ran a "sh mac address-table | i 5619" and I received " 13 fc3f.db4d.5619 DYNAMIC Po1". I just need assistance with finding what port/...
R3ne's user avatar
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0 answers
17 views

I am getting Confused with host bits and Subnet bits [duplicate]

So i am playing with Cisco CML. I made up a random address 3.0.0.0/8. I wanted to split up that subnet into 4 subnets, So 2^2 = 4. I kinda got confused along the way. In my train of though if we use ...
Eric's user avatar
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2 votes
2 answers
78 views

how do 2 different network communicate with each other

Suppose we have 2 networks with 3 PCs in each. As I understand, they can easily have the same IP addresses, but routers have different public IP addresses(e.g. here 158.127.10.3 and 158.127.10.4). So ...
Balora's user avatar
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0 answers
23 views

Wireshark filtering, wpa2 handshake type value and other types

I am capturing a wpa2 handshake with wireshark, and there is the type value of 03 which is a key I wonder if this type is constant for wpa2 handshakes, also the value of other types, if there were to ...
turtur's user avatar
  • 1
2 votes
2 answers
70 views

Is there parallelism in packet-switching?

Let's say there are two hosts h1 and h2 separated by a switch w set up in this manner [h1]----link1----[w]----link2----[h2] If we are to send a file divided evenly into two packets from h1to h2 using ...
lambduh's user avatar
  • 23
1 vote
2 answers
48 views

Ways to connect 2 buildings via networking [closed]

I am not really sure if this is the right place to ask this question. I have an assignment in which it gives the following scenario. There're 2 buildings A and B. The distance between building A and B ...
Hern's user avatar
  • 13
0 votes
1 answer
167 views

The relationship between IP address and AS number

I've recently been looking for the IP prefixes originating from a specific AS. And there are a few questions I'd like to get confirmed. We can register IP addresses and ASN from RIR. But where can we ...
wyb's user avatar
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0 votes
2 answers
75 views

Possibility of transferring data over the same-level networks, rather than the higher-level network

This is a silly(maybe interesting) question. Assume four ASes are connecting to the Tier 1 network(A, B, C and D). B is peering with C and D. A is close to B, but too far from C and D to make peering. ...
wyb's user avatar
  • 9
0 votes
2 answers
162 views

The relationship between AS upstreams, downstreams and peers

I find AS1221 is both the upstream and the peer of AS13445 from ipinfo.io/AS13445. However, as far as I know, there is no upstream or downstream relationship when talking about peering. Is anything ...
wyb's user avatar
  • 9
0 votes
1 answer
63 views

Make printer in different subnet accessible to other subnet

i am creating a network and i want the printer which is in a different subnet to be accessible by all other subnets. The router network is 192.168.10.0/24 further subdivided into /28 subnets. The ...
digiadit's user avatar
0 votes
2 answers
41 views

Are there any ASNs with 0 IP addresses? [duplicate]

Here is the list of all the US ASNs networks ranked by the number of IP addresses: https://ipinfo.io/countries/us However in the page 10, I can see some ASNs with 0 IP addresses: https://ipinfo.io/...
Loresim's user avatar
1 vote
2 answers
101 views

How does a new switch know how to reach the controller in an SDN?

Let's say we have an existing SDN network composed of several switches and a controller. Now say we connected a new switch to the network. Now how would the new switch know how to reach the controller?...
Noob_Guy's user avatar
  • 471
0 votes
2 answers
55 views

Can 2 modems connected to the same router interfere with each other if their web access interface are the same IP address?

Here is information about the network: I have 2 WAN connections to the same ISP which they provided 2 modems for and configured them to be in bridge mode. My MDF router (pfSense) connects both of ...
Dr_Xunil's user avatar
  • 105
0 votes
2 answers
157 views

Is it possible to assign a default gateway per routing interface on a layer 3 switch

Here is the scenario. Currently there is a flat layer 2 network with a single /24 subnet. The intent is to segment that /24 using a layer 3 switch. On the /24 network there exists clients with ...
Digital ink's user avatar
1 vote
0 answers
33 views

Is there any point to learning about old network address classes anymore? [closed]

It's 2023 and I continue to see people write about IPv4 A,B,C,D, and E networking classes like they still mean something and without saying it's only mentioned for historical purposes. But they are ...
deltaray's user avatar
  • 111
0 votes
2 answers
55 views

what will be fast way of finding the live hosts on network?

what will be fastest way to find the live hosts on network. Currently i am finding the live network hosts using arp request and arp response. I have to find these live hosts every second. Is there any ...
Risen Star's user avatar
0 votes
1 answer
62 views

Is TCP used for data transfer after building the routing tables (using OSPF protocol)

I am trying to understand how Data (video, image, ...) is sent over the network, and what are the protocols and different processes involved. We know that OSPF (L3 protocol) does not use TCP or UDP, ...
Lee's user avatar
  • 63
0 votes
0 answers
13 views

Purpose of netmask in dynmic DHCP statement [duplicate]

What is the purpose of the netmask in a dynamic DHCP statement: ip nat pool poolname 209.165.200.226 209.165.200.240 netmask 255.255.255.224 I know, that I should choose the netmask to be larger ...
Rubus's user avatar
  • 295
0 votes
2 answers
1k views

100Mbit vs 1Gb/sec transferring 10MB file...speed difference?

Two PC's A and B speed of transfer bits across the wire... 100/Mbit Link (100,000,000 bits) 1Gb/s Link (1,000,000,000 bits) File Size: 10MB (80,000,000 bits) I'm trying to figure out if we have ...
JoelP's user avatar
  • 29
-1 votes
1 answer
31 views

Does a VPN encryption get stripped from data during cellular transmission?

These phones have all the generations of connectivity but “only use 5G.” On top of that the new GPS Satellite iPhone feature for people that get lost does a VPN protocol work for that, what about ...
SusieJones1977's user avatar
1 vote
3 answers
148 views

How to obtain a range of IPv4 or IPv6 addresses as an individual

I am building a hobby service that can host user's containerized applications on request. These must be publicly accessible. After some googling I came to conclusion that there is no way around having ...
jlkiri's user avatar
  • 11
0 votes
2 answers
31 views

Is a ODU connection between two endpoints necessarily bi-directional?

Within an Optical Transport Network (OTN), where two nodes are connected via ODU, is it possible to configure this link uni-directional? I realize this is a very unusual application, but it is an ...
Bash Frank's user avatar
1 vote
0 answers
15 views

How to specify the address of the host in IPv4? [duplicate]

Lets say the IPv4 address is: 192.168.50.112 /26 which provides 4 subnets subnet mask: 255.255.255.192 network address 192.168.50.64/26 There are 6 bits left for the Host, how do you specify the host ...
20MikeMike's user avatar
1 vote
0 answers
24 views

Complicated bridge between 2 servers [closed]

I have 3 servers: comp_a, comp_b, comp_c comp_a ([eth0 «10.15.14.55»]) 10.0.0.0/8 <———> comp_b ([eth0 «10.15.27.61», eth1 «10.15.26.61»] [eth1 «10.15.26.61» ]) <——VPN IPS (left = 10.15.0.0/16 ...
Slashere's user avatar
0 votes
1 answer
79 views

Packet tracer is changing my addresses ipv4

Could someone help me with this? I have a subnet with the ip: 172.16.193.0 in the fastethernet 0/0 of my router and when I go to put it in RIP the Packet tracer is changing it for another ip:172.16.0....
JBALTAN's user avatar
0 votes
1 answer
25 views

Can SneakerNet Consider As Network?

As the title of the question, is that sneakernet can consider as a network? Or a network is the devices must be connected via cable or wireless?
Wei's user avatar
  • 3
0 votes
1 answer
138 views

trying to ping 192.168.2.2 from 192.168.1.1 pcs

im trying to ping pc2 from pc0 and it doesn't work can anyone help tell me why? pc0 is 192.168.1.1/24 and pc2 is 192.168.2.2/24. The port connecting switch 0 is 192.168.1.100/24 and the port ...
potatoNetwork's user avatar
0 votes
3 answers
62 views

Does the TCP protocol exist as a process?

Recently, I read "Computer Networks: A Top-Down Approach". I know that applications consist of TCP + a port number. But I keep thinking that if TCP is not a process, it can't handle any task,...
ShiZhou Huang's user avatar
0 votes
2 answers
47 views

What command would let me know Which connection links are participating VLAN 2 spanning tree?

Which connection links are participating VLAN 2 spanning tree?
s3lectstar's user avatar

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