Press "Enter" to skip to content

Posts published in “Computer & Internet”

What is the purpose of subnetting, if we have NAT?

As I know, NAT is the system, that divides IP addresses into two categories - public and private. Public represents the local network from the outside and private represents the device from the inside.

Subnetting divides one IP address in...

ARP request with unicast MAC?

Regarding ARP requests, I got to believe that the destination MAC address was in all situations the broadcast address.
Yet I got across this Wireshark capture:

I just cannot understand the 3rd request from my router. Why is the destinatio...

Usage of Flow label in IPv6 header?

I have been reading the IPv6 Flow Label Specification (RFC 6437) and I would like to ask about the purpose of setting this label.
In case of just using the 2-tuple (source address, destination address), the packets will reach the destinati...

CAT7 Ethernet cable: order of wires in the clamp

On a CAT 7 Ethernet cable each twisted pair is individually shielded, and all pairs together are inside a shielded jacket:

Colors of the wires may change, for instance I recently got my hands on a cable where the wires were all differen...

PoE active splitter (802.3af) w/ passive injector?

Is it possible to use Active PoE splitter that does comply to 802.3af, with passive PoE injector?

802.3af does autonegotiate
Does negotiation take passive PoE into account?

Edit:
Acording to: This answer @ networkengineering

Po...

Manually specify a tunnel gateway for an IPSec VPN Connection (ASA)

I have currently got several VPN's on-premise that are setup on the outside interface and using the default gateway on the interface as an originating source of the VPN tunnel.

Although the outside interface has been configured with a blo...