Press "Enter" to skip to content

Posts published in “Computer & Internet”

What are the reasons for seeing an incomplete ARP?

As was mentioned in this post:

The reason for seeing an incomplete ARP is that "An ARP request was sent for that address, but the host with that address is not up and running on the LAN, so there is no reply"

So, if a multilayer switch ...

Empty mac address value [closed]

Is there some MAC address value, that can be used to denote that device does not have MAC set (something like 0.0.0.0 for IP).? I thought of ff:ff:ff:ff:ff:ff, but afraid that it could be meaningful when set for interface.

The question is...

What is "cflow" in ipfix?

I am learning ipfix and found a cmd like this:

tshark -r ipfix.cap -n -d udp.port==4379,cflow -O cflow

What does the cflow part mean here?

I was also told to filter cflow if I use Wireshark in Windows.

Multiple VLAN setup questions

Ok, I have a basic understanding of VLAN's but I am trying to do the following setup which seems way more complicated than it should be because of things I am not sure of. I am doing this because we had a professional hacker come in and t...

What’s the domain of an IP?

CIDR stands for "Classless Inter-Domain Routing". But what's a domain in this case? Seems to not be the same kind of domain as DNS deals with...

Understanding Cisco standard access lists (Packet Tracer example)

Consider the following example: I have two networks (192.168.1.0 and 192.168.2.0) with one PC in each network (PC0 - 192.168.1.1 and PC1 - 192.168.2.1) and a router R0 with 2 interfaces connecting these networks:

Then I configure a stan...

The best way to understand Vlans?

Every time i try reading about the configuration of a device and adding it to the network, i always face a problem. The problem is basically am not able to understand Vlan's, and how for example some companies use it: to move Voice over I...

Why is broadcast used at the DHCPREQUEST step?

This is the process of DHCP operation,

My question is at the 3rd step why does the Client send a Broadcast and not a Unicast as after the previous two operations the address of the DHCP server / Relay server should be known?