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23 tháng 4 2021

Các giải pháp chủ yếu cho bảo mật hệ thống gồm có :

- Chính sách và ý thức.

- Phân quyền truy cập và nhận dạng người dùng.

- Mã hóa thông tin và nén dữ liệu.

- Lưu biên bản.

23 tháng 4 2021

Các giải pháp bảo mật chủ yếu là

+ Thiết lập các phần mềm,hệ thống ngăn chặn các truy cập nguy hại.

+ Giảm thiểu tối đa các sai sót về thông tin người dùng.

+ Đảm bảo an toàn các thông tin cá nhân,mật khẩu,...

+ Không tùy tiện cung cấp thông tin,dữ liệu... 

+Phân quyền truy cập và nhận dạng người dùng

+ Mã hóa thông tin,nén dữ liệu và lưu biên bản hệ thống

23 tháng 4 2021

Nếu ta không làm thay đổi tham số bảo vệ (như mật khẩu truy cập, khóa mã thông tin...) thì sớm hay muộn các thông tin đó trở thành phổ cập và không còn tác dụng bảo vệ. Ví dụ, một nhân viên phục vụ hệ thống chuyển sang nơi công tác và không có quyền được sử dụng CSDL, tài khoản của người đó phải bị hủy và có thể phải thay đổi mật khẩu của cả nhóm tương ứng.

  Các chương trình tin tặc cũng có thể dò tìm cách tránh hệ thống bảo vệ. Việc thay đổi thường xuyên tham số bảo vệ sẽ làm cho việc dò tìm trở nên khó khăn hơn nhiều.

23 tháng 4 2021

Nếu ta không làm thay đổi tham số bảo vệ (như mật khẩu truy cập, khóa mã thông tin…) thì sớm hay muộn các thông tin đó trở thành phổ cập và không còn tác dụng bảo vệ. Ví dụ, một nhân viên phục vụ hệ thống chuyển sang nơi công tác và không có quyền được sử dụng CSDL, tài khoản của người đó phải bị hủy và có thể phải thay đổi mật khẩu của cả nhóm tương ứng.

– Các chương trình tin tặc cũng có thể dò tìm cách tránh hệ thống bảo vệ. Việc thay đổi thường xuyên tham số bảo vệ sẽ làm cho việc dò tìm trở nên khó khăn hơn nhiều.

22 tháng 4 2021

MSWLogo hay MSLogo là một ngôn ngữ lập trình dựa trên ngôn ngữ Logo, với Front-End GUI. Nó được phát triển bởi George Mills tại Viện Công nghệ Massachusetts (MIT). Cốt lõi của nó giống như UCBLogo bởi Brian Harvey. Đây là phần mềm miễn phí, mã nguồn có sẵn, trong Borland C ++. MSWLogo hỗ trợ đồ họa turtle và 3D. Nó cũng cho phép đầu vào từ cổng COM và cổng LPT. MSWLogo hỗ trợ giao diện windows, để từ đó, đầu vào và đầu ra (I/O) có thể được thay đổi/hiển thị thông qua cổng GUI[1]. Những hình ảnh động GIF đơn giản cũng có thể được tạo ra trên MSWLogo phiên bản 6.5 với lệnh gifsave. Phần mềm này không quan trọng chữ viết in hoa hay chữ in thường, bạn có thể chọn cái bạn thích.

Phần mềm này có thể sử dụng làm phần mềm giáo dục. Jim Muller đã viết The Great Logo Adventure, một bản hướng dẫn sử dụng đầy đủ cho MSWLogo.

22 tháng 4 2021

cái đấy thì hơi dài nha

15 tháng 5 2021

program sole;

uses crt;

var a:array[1..100] of integer; i,n,s:integer;

begin

clrscr; s:=0;

write('nhap do dai cua mang');readln(n);

for i:=1 to n do begin writeln('a[',i,']=');readln(a[i]);

if a[i] mod 2 <>0 then begin writeln('cac so le trong day',a[i],' ');

s:= s+ a[i]; end; end;

readln;

end.

21 tháng 4 2021

Các phát biểu nào dưới đây sai:

A. Trong một quan hệ có thể có nhiều khóa chính

B. Mối liên kết giữa các quan hệ được xác lập trên thuộc tính khóa

C. Khóa chính xác định trong một quan hệ không có hai hàng giống hệt nhau

D. Hai quan hệ có các thuộc tính với tên giống nhau mới xác lập được liên kết

=> Chọn D. Hai quan hệ có các thuộc tính với tên giống nhau mới xác lập được liên kết

21 tháng 4 2021

Bạn giải thích cho mình được không 

21 tháng 4 2021

làm trong power point ý

21 tháng 4 2021

ok nha

...
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1
21 tháng 4 2021

I. Nội qui tham gia "Giúp tôi giải toán"

1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;

2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.

3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.

Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.

21 tháng 4 2021

là cỏ dại trong tiếng Nhật ạ?

20 tháng 4 2021

là sao !?

19 tháng 4 2021

FD 100 : đi thẳng 100 bước

RT 9000000000000 : quay phải 9000000000000o

20 tháng 4 2021

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