There will be a total of 3 technical and 1 managerial rounds. The coding will be focused on the LinkedList, BST, and simple algorithm-based problems. All 4 rounds are focused on networking and OS more. The knowledge of header fields, the messages, and the flow of packets on each TCP/IP layer will be put to the test. The deeper you explain, the more good follow-up questions will come your way. The same goes for OS. The interviews are more of a discussion rather than a one-way interview. I enjoyed interviewing at Juniper, and I suggest you will too. Best of luck.

Bit fields Structure padding Linked list BST Divide and conquer algorithm TCP/IP Routing Switching IP TCP UDP TLS IPSEC header fields OS MMU Paging system Program's memory layout CPU scheduler Interrupts Multithreading Multiprocess Synchronization (semaphores/mutexes/spin) IPC (Shared mem/ Pipes/ signals/ sockets)