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목록전체 글 (186)
hahn
Physical Environment L2 switch with 4 ports and a NIC(MAC 2) connected How to capture traffic( Source MAC 1, Dest MAC 3 ) at MAC 2 Solutions : Port Mirroring, Promiscuous Mode Promiscuous Mode : allow and disallow all traffic to be forwarded, regardless of the destination Virtual enviroment 1. Packet Capture Tools 2. IDS / IPS (VM) 3. Hypervisor on VM Nested Virtualization Enviroment external vS..
Physical Hardware > Physical NIC Virtual Hardware Virtual NIC Virtualization VMXNET VMXNET2 VMXNET3 Emulation e1000 e1000e Virtual Switch L2 Switch(MAC needed) Not Based on Hardware CPU Dependence Doesn't Learn MAC addr why? creation by hypervisor How to make MAC? OUI + Number vSwtiches do not require STP because they are not connected VLAN and Trunk Support if using VLAN with esxi supports 802...
vSphere+ = SaaS but needed vCenter Installing(on-premises) vSphere+ provided service 1. Admin Sevices 2. Developer Services : Tanzu 3. Add-On Services : Disaster recovery benefits : integrated enviroment
Hardware - BIOS(Firmware) - OS OS - Driver - Peripheral Hardware CPU contains Instruction Set If diff instructionset? e.g x86 os - network equipment(armcpu or motorola cpu) Solution : emulation
Datacenter Infrastructure 1. Server - Server Virtualization 2. Network - SDN(Software-Defined Networking) 3. Storage - SDS/HCI (Software-Defined Storage / Hyperconverged Infrastructure) Why? Software Defined Software Defined = Object(Property + Method) Result Programming > Automation > Service > Cloud
Remove Duplicates from Sorted List - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well. Example 1: Input: head = [1,1,2] Output: [1,2] Example..
Climbing Stairs - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com You are climbing a staircase. It takes n steps to reach the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? Example 1: Input: n = 2 Output: 2 Explanation: There a..
Sqrt(x) - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Given a non-negative integer x, compute and return the square root of x. Since the return type is an integer, the decimal digits are truncated, and only the integer part of the result is returned. Note: You are not allowed t..
Add Binary - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Given two binary strings a and b, return their sum as a binary string. Example 1: Input: a = "11", b = "1" Output: "100" Example 2: Input: a = "1010", b = "1011" Output: "10101" Constraints: 1 b_i ? a_i : b_i; while (a_i ..
Plus One - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com You are given a large integer represented as an integer array digits, where each digits[i] is the ith digit of the integer. The digits are ordered from most significant to least significant in left-to-right order. The large..