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What are physical interfaces?
Physical interfaces consist of a software driver and a connector into which you connect network media, such as an Ethernet cable. Logical interfaces are configured onto existing physical interfaces, usually for adding addresses and creating tunnel endpoints on the physical interfaces.
What is the meaning of virtual interface?
Virtual interfaces are network interfaces that are not associated with a physical interface. Physical interfaces have some form of physical element—for example, an RJ-45 male connector on an Ethernet cable. Virtual interfaces exist only in software; there are no physical elements.
Is VLAN a physical interface?
VLANs behave much like physical LANs, but you can group hosts even if they are not physically co-located. A switch port can belong to a VLAN. Unicast, broadcast, and multicast packets are forwarded and flooded out ports in the same VLAN.
What is the difference between physical interface and logical interface?
A physical network connects two or more physical network interfaces. A logical network is a portion of a physical network that connects two or more logical network interfaces or devices. A logical network interface or device is the software entity that is known by an operating system.
What is the purpose of virtual interface?
A virtual interface ensures redundant physical connectivity from a device to one or more switches, routers, or firewalls. For example, two controller ports can be connected to two L2 switches for physical redundancy of controller port connectivity.
What is the purpose of VLAN interface?
A VLAN Interface is a virtual interface that is attached to the physical network port or bond that your VLAN is configured on. The VLAN Interface is used to automatically tag traffic that is routed through it with the appropriate VLAN ID.
Which two interfaces are considered as physical interface?
Although channelized interfaces are generally thought of as logical or virtual, the Junos OS sees T3, T1, and NxDS0 interfaces within a channelized IQ or IQE PIC as physical interfaces. For example, both t3-0/0/0 and t3-0/0/0:1 are treated as physical interfaces by the Junos OS.
Which two interfaces are considered logical interfaces choose two?
You assign IP addresses to logical interfaces, which are created for the physical interface of a device, and then route to the IP address. Ethernet, FDDI, and Token Ring devices have one logical interface.
What are the three purposes of the virtual interface?
The virtual interface is used to support mobility management, Dynamic Host Configuration Protocol (DHCP) relay, and embedded Layer 3 security such as guest web authentication.