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Understanding subnetting [closed]

I understand how subnetting works but i don't understand how it fits in my everyday life. I have few questions 1.does only ISP's subnet networks or even private ips are subnetted ? 2. If my public ip ...
-1
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0answers
8 views

How can I calculate these ipv6 addresses? [closed]

How can I calculate these? 1. What is the solicited-node multicast IPv6 address for 2001:db8:1001:f:2c0:10ff:fe17:fc0f? 2. What is the corresponding MAC address for the solicited node multicast ...
0
votes
1answer
20 views

Simplest way to achieve single IP communication with IP camera and simple MCU?

I have a product that uses an IP camera and a simple ATmega-based motherboard for general I/O control, managing a very simple web interface, etc. Ideally, I would like to be able to access both of ...
0
votes
0answers
7 views

How can I change HTTP header parameters to test a website with automatic tools? [closed]

In order to access the login page of a webpage I have to add to the HTTP request header the following two parameters: X-Forwarded-For: 192.168.32.3 Change the user-agent field value Thus, for ...
0
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0answers
8 views

Count to infinity problem [closed]

Consider the following graph : 1 2 X-----A-----B Let X, A, B represent the nodes and ---- represent the link that connects 2 nodes. And let numbers above the link representation indicate the ...
-3
votes
0answers
13 views

The module can emit light, but why is the measured optical power far below the nominal value? [closed]

The optical module has not received any damage, and the insertion is correct, but the measured optical power is much lower than the nominal value.
0
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0answers
9 views

Why would OpenFlow require N^2 entries for MAC address learning in single table?

I'm reading this whitepaper and trying to wrap my head around why it would require O(N^2) entries for MAC address learning in OpenFlow with single table. See paragraph 2.2.1. In my naive mind, I think ...
0
votes
2answers
23 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
15 views

Some questions about a DMZ and where to place my web servers? [duplicate]

Currently i build a new network for our company which is not my specialism as i'm actually a software engineer so excuse me when this is a stupid question. I read a lot about networking last few ...
-1
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0answers
20 views

Cisco switches replacement [closed]

We looking to replace our Cisco switches 3850, 2950 with others such as HP, Dell, ...etc to reduce network costs and build a NAC. So my questions are:- Compatible to work with Cisco DNA environment. ...
0
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0answers
19 views

Does Junos convert routing policy into binary tree?

Let's say, that there is a following simply route policy in Juniper router: root@vmx> show policy test Policy test: Term 1: from route filter: 10.10.10.7/...
1
vote
2answers
42 views

Vlan vs. Subnet Broadcast Domain

It is my understanding that Vlans separate broadcast domains, but I often see people say, "subnets define a broadcast domain" as well. Is it correct to say, "Vlans define a L2 broadcast domain, and ...
0
votes
1answer
27 views

Cisco DHCP relay with Microsoft DHCP server

Current situation: we have a C3850 switch serving DHCP lease to desktop clients without communicating with any upstream DHCP server Objective: We would like the C3850 switch continue to serve DHCP ...
0
votes
0answers
13 views

Creating two network with two routers that cannot talk to each other [closed]

So I setup my home Network like this: 1- Is this setup is enough to isolate the smart devices from reaching the devices connected to the router 2 ? 2- I setup the DHCP range on the router 1 like in ...
0
votes
0answers
11 views

How to send unencrypted raw data over 802.11 WiFi? [closed]

I would like to send a 802.11 frame which data could be read by any device sniffing on the network. Think of it as a special kind of broadcast. The content of that frame will contain small chunks (8 ...
0
votes
2answers
16 views

IPv6 Extension Headers and UDP/TCP/ICMPv6 Checksums

Should the checksum for IPv6 packets (UDP, TCP, ICMPv6, etc.) change if extension headers are present? For example, will a UDP packet without a Hop-By-Hop extension header have a different checksum ...
0
votes
0answers
11 views

How do the different SNMPv2 versions work? [closed]

I'm currently reading up on different protocols and the actual details behind how they function in order to improve my networking knowledge. I was looking at SNMP versions, but more specifically ...
0
votes
0answers
8 views

How to record Monthly data count of Mikrotik PPPoE user? [closed]

I have around 50 Internet Customers with PPPoE authentication under my MikroTik. So how do I set up my MikroTik to know how much data each customer has downloaded & Uploaded monthly in total; like ...
0
votes
0answers
19 views

NTP Sync issues between Palo Alto 3260 and Juniper MX10003

I'm using a Microsemi S650 as the primary ntp server and a Juniper MX10003 as the secondary ntp server. I have the palo alto 3260 configured as follows: [edit deviceconfig system ntp-servers] ...
0
votes
1answer
36 views

Gigabit switch on a 100 Mbps router

I'm doing a file server setup, mainly I need Gigabit network on the line. I've setup a Gigabit switch in which both the client machine and the server machine is connected over the same switch. The ...
0
votes
0answers
21 views

F5 Big-IP VE incorrect load balancer operation

I have F5 Big-IP VE version 13.1.1 LTM configuration: 3 nodes pool with LB Method Round Robin Virtual Server LB (Round Robin) switches the node when the web page requests after 15 seconds. If it is ...
0
votes
4answers
65 views

Firewall placement

Ok, so I'm confused on the placement of firewalls, most diagrams I come across are as follows: ISP > router > firewall However, I'm confused about this, surely you would want a firewall before the ...
0
votes
1answer
38 views

In PIM Sparse Mode, can the Rendezvous Point be the first or last hop router?

In tutorials and configuration examples, usually, the Rendezvous Point is described as the central registry to match multicast senders with receivers. FHRs and LHRs send PIM messages to the RP to be ...
-1
votes
0answers
21 views

Why do I still get public IPv4 address whenever I move even though we’re running out of them? [closed]

I have done some google search and could not find any good explanation. I have the background of networking, but isn’t Comcast running out of IPv4 addresses? If so, that means I must have shared my ...
0
votes
0answers
15 views

Why does the IPv4 datagram header contain a `Total length` field instead of having a `Data length` field? [closed]

Based on RFC 791 and Data Communications and Networking, V Edition, I can say that Total length helps in fragmentation process. And because of that, the value of MTU also focuses upon Total length. We ...
0
votes
0answers
15 views

How does NIC decide on segment size for smaller TCP segments when tcp segmentation is enabled, assuming NIC supports segmentation? [closed]

Suppose a NIC support TCP segmentation and TCP segmentation offload is set for network interface in linux. How does NIC decide on size of TCP segments it creates from bigger frames received from TCP ...
0
votes
0answers
16 views

Internet issue with home network [closed]

I have a home network and the internet seems to be dropping every few weeks. I have a Fortigate 30E firewall and 2 access point one Meraki and one Ubiquiti. The firewall is connected WAN port by my ...
1
vote
0answers
32 views

Using a switch to dynamically connect and disconnect multiple devices together in a point to point configuration

I have an interesting issue. I have to use a switch to dynamically connect and disconnect multiple devices together in a point to point configuration, without changing anything on the end user side. ...
0
votes
0answers
9 views

Why the sequence number of the first RTP packet sent by the server to the client, is not 0 or 1? [closed]

Why the sequence number of the first RTP packet sent by the server to the client, is not 0 or 1? I was analyzing RTP in VOIP in Wireshark and i realised that the sequence no of RTP Packets don't start ...
0
votes
1answer
15 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
0answers
22 views

Does every packet belonging to a compressed HTTP response have magic bytes? [closed]

HTTP requests are often compressed using some compression scheme usually, gzip. Since, an HTTP response can be much larger than the maximum allowed size for an IP Packet, therefore an HTTP response is ...
0
votes
2answers
28 views

why ip protocol use fragment offset instead of index number?

I was wondering why the IP protocol use fragment offset to define the fragments of an IP datagram instead of using index number (first fragment with index 0, second with index 1, ...). We already know ...
0
votes
2answers
30 views

ICMP is a protocol working in the Network Layer. Why does it send few fields of the transport layer while reporting an error?

I was confused if ICMP is a network layer protocol why does it send transport layer fields in its error reporting messages.
0
votes
3answers
45 views

Cisco ASA Port Forwarding

I am trying to set up port forwarding on my Cisco ASA security appliance. I have tried several tutorials and can not seem to get it to work. The ASA is set up behind my internet providers gateway. ...
0
votes
0answers
7 views

how to make Linux domain service accessible globally [closed]

I am working on a case study where there is a company which has a couple of windows system like Windows home and pro running windows based software. The company wants to expand globally and for that, ...
-1
votes
0answers
20 views

Why can't hubs operate with full-duplex? [duplicate]

Hubs are dumb devices that flood all ports with traffic received on each. They can only be used in half duplex, thus they have to use collision detection (cdma/cd). I don't understand why we can't ...
0
votes
2answers
32 views

Tagged frames onto untagged (access) port!

have been trying to understand ingress behaviour on untagged port, specially w.r.t tagged frames. On going through ieee 802.1q doc, i found this (8.6.2) : "Each Port may support an Enable Ingress ...
-1
votes
0answers
42 views

List of routers that yield full gigabit internet speed to 1 ethernet port [closed]

I have 940 mbps downstream internet. If I direct connect a PC to the modem I get the full 940 mbps. I've only tried routers that claim gigabit Ethernet, and I only do Ethernet, and use via Cat5e ...
0
votes
1answer
18 views

characteristics of different bit sequences over network

Do different sequences of bits exhibit different characteristics when sent over a network. For example, does one sequence of bits have a higher error rate than another sequence? If there are ...
0
votes
0answers
12 views

Suricata triggers on read from file, but not from same packets via Ethernet [closed]

I am trying to get suricata to detect that a trogan is on the network. Suricata can detect this whenever it reads the packets directly from a file (-r) however it cannot do it when these same packets ...
0
votes
0answers
15 views

How to set vlanif routing on L3 switch between Google Nest and wired network [closed]

I've just added Google Nest Wifi Mesh, and plugged it into my existing L3 switch which has a number of other house devices on it (PC/tv etc.). Wifi works fine, has internet access etc., my problem ...
0
votes
0answers
13 views

Share Internet through thunderbolt between two Macbook Pros [closed]

I have two Macbook Pros with Mojave 10.14.6. A and B. Computer A has a VPN installed and it works fine. I can select the location I want to connect from and the IP it will show is one from the region ...
0
votes
0answers
13 views

Cisco 5506 WAN/LAN mismatch [closed]

I have a problem when connecting the wireless router for my home network to a Cisco 5506 ASA. The ASA creates a VPN tunnel to my workplace, and my work computer connects to a specific port on the ASA. ...
0
votes
0answers
28 views

Throughput oscillating in speedtest with iPerf3 [closed]

I have to test my network speed using iPerf3. I'm using a Virtual Machine running Ubuntu 18.04 connected to a smartphone through WiFi. I'm using HE.NET on my smartphone, which allows me to run an ...
-1
votes
0answers
20 views

how does arp scanning cross the network layer? [closed]

I have the following setup in my network: cc:cc:cc:cc:cc:cc -------- 192.168.1.5/24 phone bb:bb:bb:bb:bb:bb (other networks and ...
-2
votes
0answers
15 views

Error Detection and Correction in the data link layer [closed]

compare and contrast the difference between checksum, CRC and Hamming codes in terms of their Hamming distance and explain advantages and disadvantages of each of them. Can someone please their ...
0
votes
0answers
12 views

Using VPN creates weird geolocation on google-services [closed]

To my situation: I'm in Germany. I have set up an OpenVPN-Tunnel to my vServer thats also located in Germany. When I check my IP and my location it always says I'm in Germany. All as expected. But ...
0
votes
0answers
8 views

Should I switch to AAAA DNS records [closed]

My ISP has recently began to roll out IPv6 addresses to it's client alongside IPv4 addresses. Would it now, for someone like me hosting a server at home with some websites, web apps, etc make sense to ...
-2
votes
0answers
22 views

How submarine cable ships deal with plate tectonic motions? [closed]

I suppose submarine cables are not so stretched? Do they bury cables in the middle of ocean? Similar question: how could cables be brought to the surface for repair, when they are too stretched?
-1
votes
0answers
14 views

How can I assign an IP without DHCP enabled on the router and no static IP configuration possible on the device itself [closed]

Situation I have a Chromecast that I want to connect with an ethernet cable. So I've bought an ethernet to micro usb adapter. I plug the ethernet cable into my router but the chromecast will not get ...

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