cbp0 up up..................> customer backbone port
https://www.juniper.net/documentation/en_US/junos13.3/topics/concept/pbb-pip-cbp-interface-understanding.html
demux0 up up..............> its a logical subscriber interface and its created dynamically by DHCP access method.
http://www.juniper.net/documentation/en_US/junos/topics/concept/subscriber-management-ip-demux.html
dsc up up.....................> dsc is discard iterface and its a virtual interface
https://www.juniper.net/documentation/en_US/junos15.1/topics/concept/interfaces-discard-interfaces-overview.html
em0 up up....................>Both EM0 and EM1 are internal interfaces that connect between the Routing Engine (RE) and the Control Board (CB). There is no correlation between EM0/EM1 to any physical interfaces.
gre up up.........................>Configuration of a GRE (Generic Routing Encapsulation) tunnel requires defining the tunnel source and tunnel destination addresses. It is important to note that the tunnel destination address is by default considered to be reachable using the default routing table "inet.0".
ipip up up..........................> Its same as GRE tunnel interfce
Internally generated IP-over-IP interface. This interface is generated by the Junos OS to handle IP-over-IP encapsulation. It is not a configurable interface.
irb up up..........................> its logical interface for routing and bridging use for inter vlan routing. And also call it as routed vlan interfaces in ex series switches.
lo0 up up..........................> loopback interface
lo0.16384 up up inet 127.0.0.1 --> 0/0.........................> loopback interface
lo0.16385 up up inet 128.0.0.4 --> 0/0.........................> loopback interfacehttps://www.juniper.net/documentation/en_US/junos15.1/topics/concept/interface-security-loopback-understanding.html
inet6 fe80::200:f:fc00:1111............................................> ip version 6 interface
lsi up up........................................................................> label switched interface used in VRF for MPLS VPNs.
mtun up up....................................................................>Internally generated interface that is not configurable.
pimd up up.....................................................................>Internally generated interface that is not configurable.
pime up up.....................................................................>Internally generated interface that is not configurable.
pip0 up up......................................................................>provider instance port
https://www.juniper.net/documentation/en_US/junos13.3/topics/concept/pbb-pip-cbp-interface-understanding.html
pp0 up up.......................................................................> point to point interface
tap up up........................................................................> Internally generated interface that is not configurable.
OR
pl refer below link for complete list of logical interfaces in juniper and sometimes its depends or series to series devices.
https://www.juniper.net/documentation/en_US/junos/topics/concept/interfaces-interface-naming-overview.html