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What is "industrial ethernet"?
20 votes

Industrial Ethernet is the use of Ethernet in an industrial environment with protocols that provide determinism and real-time control. Protocols for Industrial Ethernet include EtherCAT, ...

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Is there a way to find out what user performed the last configuration on an interface?
7 votes

You can perform it in Three ways. TACACS+ Server SNMP Server(using SNMP trap, can be sent to external SNMP server) Syslog Server. Additionally Basic level login details are able store in switch. ...

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What's the difference between DHCP Disabled or Relay on an access point?
Accepted answer
5 votes

DHCP Enabled - Dynamically IP address is released (allocated) for Users on Network. DHCP Disabled - Automatic IP address allocation is disabled, Need to provide manual and Static IP address ...

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Cisco 3750X Switch stack best practices
Accepted answer
5 votes

I am debating between taking all my servers and putting them on one of the 5 switches, or distributing them over the first few ports of all 5 switches? Best thing to do is distribute them over ...

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APIPA and LAN Broadcast Domain
5 votes

If the computers are in the same LAN or VLAN, they will be able to communicate with the APIPA-assigned addresses. In fact, that is the reason that the APIPA even exists - to allow computers to ...

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What's the commands of Cisco query bgp neighbor table, bgp table and router table?
Accepted answer
5 votes

BGP Route table show ip bgp BGP neighbor table show ip bgp neighbors Route table sh ip route

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What is the purpose of a switch routed port?
Accepted answer
4 votes

Routed Interface means it is a Layer3 physical Ports which is not supported to Layer 2 communications such as STP. All Ethernet ports are routed interfaces by default.(in router) You can change ...

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Let connections go through a server to a router in packet tracer
Accepted answer
4 votes

Cisco Packet tracer is CCNA Level Simulation software. Therefore it does not support advanced features. If you want to do advanced level configuration, you have to use GNS3. It will support ...

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Able to ping Domain internal address on home network, why?
3 votes

You are pinging to public resolve name. Therefore you are getting reply. You cannot ping directly to internal network. If you are getting reply from unexpected Ip address there will be many reasons. ...

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P2P Connections
3 votes

End to End mean communication Between Two devices or application. It Simply if you are calling to your friend via Skype it is end to end communication. It does not care about what is in the middle. ...

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How is the term "fabric" defined in networking?
3 votes

I think you have an Idea about Fabric. It means clothes. Now just think how cloth is made with yarn. Everything is inter-connected. See this Image. You will get the idea. Network Fabric is also ...

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Can odd or even parity correct errors
Accepted answer
3 votes

Parity use to detect errors, not for correcting.Especially it is used to validate Integrity of Data. If parity check is failed in receiver's end frame will be rejected. Read this article for more ...

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Enterprise network VS Industrial network
3 votes

Enterprise Network An enterprise network is an enterprise's communications backbone that helps connect computers and related devices across departments and workgroup networks, facilitating ...

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Is it mandatory to upgrade backup ILL connection when MPLS circuit is upgraded?
3 votes

Is it mandatory to upgrade ILL connection too Simple answer is "NO". In management perspective, you cannot increase bandwidth as per your own idea. you should plan capacity and then you can increase ...

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Bridged Mode Networking vs. Network Bridge
Accepted answer
3 votes

Bridge mode is the configuration that disables the NAT feature on the modem and allows a router to function as a DHCP server without an IP Address conflict. Connecting multiple routers can ...

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How to add multiple ip address in destination ip in acl rule
3 votes

ip access-list acl-01 Deny ip <destination IP> <destination wild card> host <source ip> permit any any Implementation should be done in interface and direction should be in/out but ...

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How to do port mirroring in Juniper EX2200 switch
Accepted answer
3 votes

Requirements Junos OS Release 9.0 or later for EX Series switches One EX Series switch set interfaces ge-0/0/0 unit 0 family ethernet-switching set interfaces ge-0/0/1 unit 0 family inet 192.1.1.1/...

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Using Extended ACL on destination instead of source
Accepted answer
3 votes

If you block from your R1 you are not able ping to any destination because icmp packets are dropped from R1. Therefore It is applied on R2. Then it will blocked on specific traffic to Server. To ...

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Interface VLAN IP address not on exclude list?
Accepted answer
3 votes

No it is not required. cisco says, The IP address configured on the router interface is automatically excluded from the DHCP address pool. More details are here (cisco official site)

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1 switch handling several servers or several switches handling a server each?
Accepted answer
3 votes

Yes. Your Idea is correct, but the concept is broader. There are two type of Traffic in Network. East/West Traffic North/South Traffic East/West Traffic is traffic between servers. It is separate ...

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What does multi area OSPF mean?
Accepted answer
3 votes

By default OSPF use a single area but when you have a large network and you want some network segmentation, you can use a multi area network. In General multi area is not used in small environments. ...

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Can i run scanner on cisco packet tracer network
Accepted answer
3 votes

Cisco Packet Tracer is a basic Level Simulator Software and it provide only CCNA level configurations. If you want to do advanced configurations, such as virtualization, containerization, Packet ...

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Do I need to protect SFP ports and optics from dust/contaminants? If so, how?
3 votes

I think this is a somewhat broader question and i will put answer as much as simple. You need to protect Empty SFP module. You can purchase additional dust cap if it is required. Generally most of ...

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WAN encapsulation
3 votes

The term encapsulation is used to describe a process of adding headers and trailers around some data. For example, here is what happens when you send an email using your favourite email program (like ...

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What is Open Radio Access Network?
Accepted answer
3 votes

A radio access network (RAN) is part of a mobile telecommunication system. It implements a radio access technology. Conceptually, it resides between a device such as a mobile phone, a computer, or any ...

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Who can get ARP packets?
2 votes

ARP is Layer 2 Protocol. It is not working on Router. Because Router is working on Layer 3. If Bob and alice connected through router,then they looking at IP address. If Bob and Alice connect to ...

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I have L2 network in Delhi, can it communicate without router to L2 network in Florida, using only STP protocol,
Accepted answer
2 votes

No, it is not possible at all. If you need that kind of solution, you have to have a direct connection between these two locations. It is not a practical solution and therefore you have to use an ISP ...

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How to discover a host when you don't know its mac, ip and subnet?
Accepted answer
2 votes

You can access it via Serial port or Console cable. But you need to know username and Password. But it should be a manageable switch. Generally switch has no ip address and if it has ip address that ...

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What is the purpose of a VPN?
2 votes

VPN stand for Virtual Private network. It makes secured tunnel through public internet. Generally we don't use VPN in Local area network and if you want to connect with your branch network in separate ...

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How to differentiate if a Cisco device is a L3 switch or a Router?
2 votes

Use below command. You can identify Show Version

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