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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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14 views

How to find the last valid host IP number allowed for a network. (Linux Networking) [on hold]

I'm doing a Linux Networking homework course and I'm stuck on a question. `Your device "item2" is connected to the network. With a network ip of 192.168.1.0 and netmask of 255.255.255.0, what is the ...
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0answers
8 views

Network throttling using lighthouse [on hold]

lighthouse is a good example of web application monitoring tools. How to throttle network using lighthouse commands. Eg. lighthouse https://ehealth.kerala.gov.in/ --output=json --output-path=./...
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0answers
24 views

CNAME and A Record Confusion [on hold]

My question is about CNAME and A records. As far as I know, CNAME(Canonical Name) simply points a domain/subdomain to another domain/subdomain. For example, www.foo.com -> foo.com Also, A(...
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1answer
18 views

Is the Backbone Area connected AS Area are through one router?

I am studying Networking, and I find the Area 0.0.0.1, Area 0.0.0.2 connect to the Backbone Area is through one path, is it means only through one router(or say not more)? we often hear that the ...
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votes
1answer
33 views

BroadBand to Ethernet converter [closed]

we will have PaloAlto Firewall to use it in our SOC network and the line that we have is 100M broadband Internet, please I need your help to find a solution to convert the available 100M broadband ...
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0answers
13 views

Fast Flux Networks? [closed]

So I've been researching into the topic of bulletproof host's and Fast Flux Networks for security of domains. Now I know Fast flux works through DNS changing and etc.. But from network setup point, ...
0
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1answer
23 views

Routing an owned /24 IPv4 block to a single server

How would one go about routing a recently-purchased /24 block of IPv4's to a single server? The server is colocated in Zare.com, and the BGP session is already set up and announced.
5
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3answers
886 views

What is the characteristic of spoofed ARP packets?

Hi what is the characteristic of spoofed ARP packets? I want to know how to detect it but before that I have to know how can I call a packet a spoofed packet. I hope you can help me thank you.
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2answers
60 views

Do I need a Gateway if I try to Ping a Client in the same Network?

In NFX I'm trying to create - Devices in a Network with 2 Clients, which can communicate with each other. But it does not work, is it because I have not set a Gateway which can tell the Client, where ...
1
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2answers
94 views

How does DOCSIS relate to DVB-C

I'm new at telecommunications so this may be a simple question, but somehow I can't get my head around this. Can someone explain me in simple words how the terms DOCSIS and DVB-C are related? Both are ...
1
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2answers
70 views

Re-building an old network

I've been recently tasked with re-building an old computer network for a small enterprise that was always maintained very poorly. To give you an idea of a situation: A single router is connected to ...
2
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1answer
48 views

How a client behaves if same IP address is assigned to two different interfaces?

First of all, these questions are just out of curiosity. I don't have such configuration, I'm just wondering how a box would behave in such environment. Say we have a Linux box with two network ...
2
votes
2answers
67 views

Why can't I get a WiFi password by sending out the same SSID?

If I have two WiFi routers in different locations but with the same SSIDs and I connect a device to one of them, when I bring this device near the location of the other router, it will automatically ...
1
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2answers
45 views

Why are the routes taken by packets random using LPM?

Consider the Longest Prefix Matching (LPM) mechanism that routers use to decide which data link the packet should be sent next. Assuming that the router tables don't change, shouldn't the path the ...
0
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1answer
36 views

Network routing/WAN failover

Hi any one recommend me WAN Fail-over in Cisco 2811 router in virtual interfaces I already try this configuration. but its not working ip route 0.0.0.0 0.0.0.0 192.168.86.1 ip route 0.0.0.0 0.0.0....
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1answer
51 views

I want to ping from pc 192.168.1.2 to pc 192.168.2.2 but i am not able to do so. Can someone tell me my mistake

The network is able to ping from pc 192.168.1.2 to router interface 192.168.3.1.
0
votes
1answer
24 views

Whether every TCP packet have a Ack Reply?

The TCP Acknowledgements you see in the diagram's green arrows, have ACK numbers separated by 3000(two 1500 bytes). I have a question, why the Ack number is separated by two packets? Or is it just ...
0
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1answer
72 views

Finding the source MAC address in Router Advertisements [closed]

What is the source MAC address in the Router Advertisement packets received on the interface eth1? -i have ran tcpdump -i eth1 and tcpdump -n -i eth0 icmp6 -ifconfig eth1 and tried using the HWaddr ...
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0answers
22 views

Create and Deploy F5 BigIP LTM with Ansible

I'm trying to create and deploy an F5 BigIP machine on a remote machine. What I found from F5 tutorial is apparently how to add pools and nodes to an existing BigIP in playbooks, as shown below. But ...
2
votes
1answer
39 views

Cisco nexus 3048 SFP validation failed

I have cisco Nexus 3048TP switch (48x1G + 4x10G) Hardware cisco Nexus 3048 Chassis ("48x1GE + 4x10G Supervisor") Intel(R) Celeron(R) CPU P4505 @ 1.87GHz with 3665240 kB of memory. ...
0
votes
1answer
41 views

Configuration file of switches format

Do we need different config files for each category [aaa, bfd, ptp, lldp, vlan etc] for deployment or can there be a single config file that contains all [aaa, bfd, ptp, lldp, vlan etc] and do they ...
2
votes
1answer
53 views

What do exclamation '!' and period '.' mean in a switch config file

what do the ! and . mean in switch config files? Current configuration: 1363 bytes ! version 12.1 no service pad service timestamps debug uptime service timestamps log uptime no service password-...
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1answer
34 views

Whether the network between Routers are circuit-switched network, and the network connected by Switches are packet-switched network?

Whether the network between Routers are circuit-switched network? and the network connected by Switches are packet-switched network? EDIT-01 I mean if the Net1 can be regarded as circuit-switched ...
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1answer
38 views

How are IP addresses assigned? [closed]

1) If I buy a new computer, I haven't connected to the internet yet, don't I have ip address? 2) if I get the ip in one county, IANA gives me the ip depends on my location (first numbers), if I ...
1
vote
1answer
23 views

For ethernet with bandwidth B, how much time a node has to wait before sensing the channel after the first collision detected?

Let's say one node detected a collision at t=0, in B Mbps ethernet, how long will that node wait before sensing the channel again?
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0answers
16 views

To design a leaky bucket traffic policer what all things do we need to keep in mind?

Let's say our long-term average rate is r packet/second, burst size it at most b packets and peak rate is p packets/second and p>r. From my understanding, at any given time t, tp<=b-rt should hold
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1answer
29 views

CIR and EIR - how to test/calculate?

im wodering how to test CIR EIR between two localization? we have direct link between these locations and I got a question about CIR EIR How can I test/calculate it?
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2answers
67 views

To what extent can ISPs control routing in a packet-switched network?

As an application developer my entire understanding of networks was a high level 'acceptance' of http request/response pairs along with some DNS addressing. Somewhere in the back of my mind I ...
2
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2answers
26 views

How to understand the `Data in the Network Access Layer, it will be break up into smaller units.`?

Today when I read a book, there is a sentence: Data in the Network Access Layer(TCP/IP's layer 1/4), it will be break up into smaller units. I can not understand this statement, does it mean the ...
0
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1answer
26 views

How to compute the round trip delay

I have a query on how to compute round trip delay. I know it is 2 times the propagation time, but let's say I have a packet of 100 bits and a transmission speed of 2 Gbit/sec, how do I compute the ...
1
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3answers
118 views

difference between ip checksum and tcp checksum

If an error on a packet occurs on a router, who does detect the error, IP checksum or TCP checksum? I have understood that the ipv4 checksum detects errors only inside the ip header and the tcp ...
0
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1answer
55 views

How to assign 2000 addresses starting from 198.16.16.0? [duplicate]

This problem comes from Tannanebaum's CN book and the full description of it is as follows: A large number of consecutive IP addresses are available starting at 198.16.0.0. Suppose that four ...
0
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1answer
45 views

Some users/routers often can't access the internet [closed]

There are times that some users can't access the internet. Usually this happens with the routers with DHCP enabled, they alternately can't access internet. I suspect that the main router is faulty. I ...
0
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1answer
32 views

How to do remote testing of firewall rules that are location based

I have managed servers that I have access to. I requested firewall rules that are location based (like making sure nobody can SSH to a server unless they are connecting from a specific public IP. I'd ...
3
votes
2answers
55 views

Why does ip routing not take an even remotely direct route?

I ran a traceroute on a url to a server we own in New York. I'm in central Florida. Traceroute showed the request being directed to west Florida and then far south Florida before finally being ...
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2answers
58 views

Understanding how devices on a LAN/VLAN discover the existence of other local devices

Let's say you have a brand new 192.168.1.0/24 network that consists of a router, switch and two hosts (H1 and H2). H1 would like to communicate with H2, but since this is a brand new network and no ...
0
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1answer
16 views

What is the general Traffic Flow of 2 Clients connected to the same AP?

If Client A and Client B are both connected to Access Point C and A + B want to talk to each other, does C act as a switch between the two of these clients or does C have to send that traffic back to ...
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0answers
32 views

Poor VPN Performance

Initial configuraion <internet provider WAN> -- router/modem -- switch ------ clients(s) The "router/modem" DHCP handles 192.168.1.X. New configuration <internet provider WAN> -- ...
2
votes
1answer
22 views

F5 BigIQ communication with BigIP

I'm new to F5. Basically a BigIQ centrally manages BigIP load balancers. In order to update the device, I have to login to the UI and apply the changes there. I would like to know how this is done (...
5
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4answers
172 views

Packet Collison Avoidance

If a wireless network has collision avoidance, how comes the network slows down if more clients connect to it?
1
vote
1answer
245 views

Find subnet prefix/CIDR from IP address and required No of hosts [duplicate]

I want to know that how can we calculate the Subnet prefix and CIDR, when the given information is only IP address and required No of hosts. For example: Suppose we have: IP Address= 198.1.1.0 and ...
1
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2answers
116 views

What are the collision domain reducing devices?

What are the collision domain reducing devices? if collision reduce how it advantage to network?
0
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3answers
185 views

What's the meaning of `inet` and `inet6`?

When I reading a doc: Logical properties settings include: - Protocol family: inet inet6 iso mpls bridge/ethernet-switching I don't know the inet, inet6, and iso meaning there, I ...
1
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0answers
21 views

add vlan id or mac id to dude to add a network [closed]

How to add ONU Machines Vlan ID or MAC ID to the Mikrotik Dude Server? I am using ccr-1036 to serve internet connection to my users. we are using vlan id to identify per sub-stations that contains ...
2
votes
1answer
46 views

HP 6120X Blade switch QoS

I just got access of blade center and i was looking at configuration of switch which is following. I can see switch has already QoS configured, I am not very expert in QoS so trying to understand ...
1
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1answer
28 views

Circuit switching. How is the data rate divided for each circuit in a link for FDM and TDM?

FDM allocates portions of bandwidth to each circuit in the link. According to the Nquist equation, this would propotionally divide the data rate among the circuits. Now with TDM time slots are ...
1
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3answers
104 views

how to do inter vlan for same subnet

I configure two same subnet network(ip:192.168.0.2 & ip:192.168.0.3) into VLAN...so they wont communicating with each other...but now i want them to communicate with each other... For that i ...
4
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2answers
936 views

Why we use 224 as multicast address in many protocols?

I see in many protocols we use 224 multicast address as like eigrp uses 224.0.0.10 ospf uses 224.0.0.5 224.0.0.6
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2answers
69 views

Receiving another system's network packets

I'm looking for a way to receive all network traffic intended to go to my desktop PC, on another device. I believe I need either a network hub or network switch with monitoring port for this, but ...
1
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1answer
81 views

Improve ping speed (lower up ping time) [closed]

In normal network with Cisco 3650 (1Gbps) and Linux base servers, the ping time is between 0.150ms to 0.250ms. (I also mean using ping or ICMP is to refer to all protocols) I want to know is there ...