백구씨의 오늘!

아휴~ 만들어보자.

백구씨쥔장 2006. 12. 3. 13:34

1) Slotted-ALOHA
• The time of the channel is divided by a time-slot with the fixed length
• The size of a frame is fixed and a frame is transmitted during a time-slot.
• A node having frames transmits with probability p, at the beginning of a time-slot

2)1-persistent CSMA/CD + binary exponential backoff
• 1-persistent CSMA + Collision detection
  - Listen before transmission till channel is free
  - If the channel idle, transmit
  - Additionally continue to monitor channel during transmission
  - If collision is detected, immediately abort transmission and try to retransmit after the delay which is
  determined according to the binary backoff scheme
• binary exponential backoff
  - The delay is an integral multiple of slot time. The number of slot time to delay before nth retransmission
   attempts is chosen as an uniformly distributed random integer r in the range 0 < r  2K,
   where K=min(n,10).

3) Server에서 실행되고 있는 임의의 프로세스 cpu/mem usage 얻기
(top 소스 복잡하던데, 좋은 소스 없나?)

4) 임의의 프로세스가 syslog에 critical msg 또는 info msg를 남기면 trap이 발생되어 Client에서 해당정보를 얻기

ps. 누가 대신 만들어줬으면 좋겠다...ㅜㅜ