How to use other vendor SFP in Cisco Switch??
--> If you use any other vendor SFP instead of Cisco in Cisco Catalyst switches, the port automatically goes to the err-disable state. --> This is because by default Cisco Catalyst switches do not support another vendor SFPs in switch ports. --> Each and every SFP conta…
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What is Passive Interface?
--> Passive Interface is a feature used by routing protocol to stop sending updates on the particular interface. --> Basically this command is applied on the router interface which is connected to LAN or Loopback. --> Routing updates are only understood by the routers. …
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What is Dual Active Detection in VSS?
--> A Virtual Switching System is formed by using a VSL (virtual switch link) between both switches of 4500 or 6500 series. --> In VSS, one switch acts as Active Switch and other as Standby Switch. --> If the VSL Link between both the switches is broken, then standby sw…
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What is Forced Authorization Codes in CUCM ?
--> Forced Authorization Codes (FAC) is another method of implementing call restriction in Voice networks. --> Forced Authorization Codes (FAC) requires a user to enter a code or PIN before to the call being connected. --> Forced Authorization Codes (FAC) restrict outgo…
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Types of Security Operation Centers(SOC) ?
1) Threat Centric SOC --> A threat-centric SOC actively searches for malicious threats in the network. --> New threats can be identified with the help of i) known vulnerabilities 2) threat intelligence feed services 3) malicious anomalies across networks. --> In order t…
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Understanding IP Header
--> IP Address operates at Layer 3 of OSI reference model and Layer 2 of TCP/IP model. --> IP uses Packets to carry the information throughout the network. --> IP is a connectionless protocol which does not require any acknowledgment from the destination after it has b…
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What is BFD?
--> BFD stands for bidirectional forwarding detection. --> BFD is used to detect link failures very fastly compared to normal hello/hold down timers which are used in routing protocols. --> BFD is independent of any routing protocol such as EIGRP/OSPF/BGP/static. -->…
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What is IP Source Routing?
--> Source routing is a technique whereby the sender of a packet can specify the route that a packet should take through the network. --> As a packet travels through the network, each router will examine the destination IP address and choose the next hop to forward the pac…
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