It is an acronym with over 250 meanings .
See link below
ISR queues
void. ISR returns nothing
Yes. We can use breakpoint inside the ISR.
dmz, NAT,ISR
full form of the ISR is interrupt service routine.
An ISR provides the functionality of a switch, router, and firewall in one device
The 2013 Bentley Supersports-Convertible-ISR has a W12 engine.
The ISR router acts as both a DHCP client and server.
HISR: High Level ISR (Interrupt Service Routine) LISR: Low Level ISR
The 2013 Bentley Supersports-Convertible-ISR has double overhead cam (DOHC).
The 2013 Bentley Supersports-Convertible-ISR has a 6-speed shiftable automatic.
ISR router will do lot of services compared with normal router. For example terminating VPN Sections, VoIP support, and bridging LAN/WAN cards. Basically ISR routers are modular routers, you can insert WAN T1/E1, SONET, etc cards. - kumar