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.
794
questions
0
votes
0
answers
19
views
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 ...
- 101
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 ...
- 121
0
votes
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 ...
- 101
0
votes
0
answers
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 ...
0
votes
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 ...
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 ...
- 3
0
votes
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 ...
- 395
0
votes
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, ...
- 1
0
votes
1
answer
36
views
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 ...
- 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 ...
- 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?
...
- 11
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 ...
- 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 ...
- 253
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?
0
votes
0
answers
21
views
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 ...
0
votes
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 ...
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 ...
- 4,351
0
votes
0
answers
19
views
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. ...
- 1
0
votes
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 ...
- 1
0
votes
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 ...
- 101
0
votes
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....
- 3
0
votes
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/...
- 41
0
votes
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 ...
- 33
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 ...
- 23
0
votes
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 ...
- 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 ...
- 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 ...
- 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 ...
- 9
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. ...
- 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 ...
- 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 ...
- 1
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/...
- 1
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?...
- 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 ...
- 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 ...
- 101
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 ...
- 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 ...
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, ...
- 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 ...
- 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 ...
- 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 ...
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 ...
- 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 ...
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 ...
- 11
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 ...
- 11
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....
- 9
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?
- 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 ...
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,...
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?
- 11