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1500 questions
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2 answers

intersymbol interference (ISI), channels, and frequencies

When describing 802.11b/g and the 2.4 GHz channels, or 802.11a/n with 5 GHz channels, textbooks (CWNA Official Study Guide) often show some figure with channels spaced such that certain channels cannot overlap and therefore ISI is avoided. The…
T. Webster
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Is it true that the fd00::/8 address range (ULA) in ipv6 is for machines that you NEVER want to speak with anything on the Internet?

Is it true that the fd00::/8 address space (User Local Addresses) in ipv6 is for machines that you NEVER want to speak with anything on the Internet? I was just reading that here and rather surprised to find that was the case.
leeand00
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How LAN works in video games if only one station is permitted to transmit?

I've read the in a LAN the data is transmitted in packets so as to allow only one station to transmit at a given time, so how could this be applied in video games LAN parties if only one device is going to transmit at a given time ? Data are…
eis3nheim
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How does UDP NAT Know When To Remove The Rule

So say you are a user behind a NAT/router on an internal network. You begin sending UDP data to an internet-facing server. The packet hits your router, it inserts an entry to allow returning packets from that server on a specific port to be…
James Dean
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2 answers

Single Public IP Address for multiple physical locations

Is it possible to get or set up a public IP address that is load-balanced between multiple physical locations or sites? It may be something like a virtual IP address (VIP), which points to multiple IP addresses, and incoming traffic is load-balanced…
kzia
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1 answer

Struggling inbound and outbound traffic engineering to/from iBGP peers at different POPs

We are a managed service provider running a small sized network in a single datacentre in Sydney. We've recently deployed a new POP inter-state in Melbourne (both are on the east coast of Australia), and for the first time I am having to face…
Geekman
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Distributed Trunking Inconsistent MAC table

I've recently faced a problem in an HPE Distributed-Trunking Switch-to-Switch Square-Topology. Image 1 (shows the essential part of the architecture that consists of 4 switches working in pairs, being switch A1 and A2 the first pair, B1 and B2 the…
Francesco Ruggeri
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2 answers

is there a difference between Latency and speed ?

so latency is the time it takes for bits to get from the sender to the receiver and the speed is how fast bits travel , so logically the more speed the network has the more low latency it has also , but why are people saying that Satellite…
justin
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Why are iBGP routes not propagated to other iBGP neighbors?

I have been searching this on the web. It is generally expressed as by default, iBGP does not propagate routes learned via other iBGP neighbors. I am trying to understand the underlying reason. The answers I have found are somewhat circular: the…
john
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How to force VPLS/L2VPN to use a specific path

We're using VPLS and L2VPN on Juniper MX for L2 connections. Signaling is done via BGP and label distribution via LDP. Now we want one L2VPN to use a specific path trough the network and not follow the IGP. As we currently only use LDP we would…
Sebastian Wiesinger
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How is anycast implemented?

According to this answer Google DNS (8.8.8.8) has low worldwide latencies because it uses anycast. How is anycast actually implemented? That is, how does a packet get routed to different computers around the world? Wouldn't that mean that different…
Darthtrader
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What is the voltage used in ethernet lines (UTP Cables)?

I am asking this because after doing some research I found some conflicting information. First, on Wikipedia page on Ethernet physical layer I found that the voltage on the lines is 2.5V. https://en.wikipedia.org/wiki/Ethernet_physical_layer But in…
yoyo_fun
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Is rerouting possible in UDP?

So I am trying to understand routing for TCP and UDP segments. I have a couple of things that I am confused about: In TCP, is there any specification on how many packets would be dropped before a rerouting would be done for a connection established…
Ibrahim Nadir
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4 answers

ASA use of proxy ARP for NAT

I will be performing NAT on the outside interface of an ASA to a web server within a DMZ. I would like to disable proxy-arp on all the interfaces that I can. I know that outside interface will need to have proxy-arp enabled because of the NAT…
henklu
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Policy routing configuration in Fortigate

I have an scenario where a Fortigate firewall is used to separate internal networks from the Internet (FortiOS Version 4.0 MR3 patch 11). Right now there is a single Internet connection attached to the firewall and a default static route is used to…
Daniel Yuste Aroca
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