Column A
(Backup media)Column B
(Description)a. Tape Drive i. Cheap but slower, optical media b. SSD Backup Disk ii. Fast random access, durable c. Cloud Backup iii. Remote, internet-based storage d. DVD Archive iv. Sequential-access, low cost per TB
Codes:
This question requires matching different types of backup media with their corresponding descriptions. Understanding the characteristics of each backup medium is key to making the correct pairings.
| Column A: Backup Media | Column B: Description |
|---|---|
| a. Tape Drive | iv. Sequential-access, low cost per TB |
| b. SSD Backup Disk | ii. Fast random access, durable |
| c. Cloud Backup | iii. Remote, internet-based storage |
| d. DVD Archive | i. Cheap but slower, optical media |
Let's break down why each backup medium is correctly matched with its description:
Tape drives are well-known for their sequential access nature, meaning data must be read or written in order from beginning to end. They offer a very low cost per terabyte (TB), making them ideal for large-scale, long-term archiving or backups where speed is not the primary concern. Therefore, Tape Drive matches with 'Sequential-access, low cost per TB'.
SSD Backup Disks utilize Solid State Drive technology. SSDs are characterized by their speed, specifically fast random access capabilities, allowing quick retrieval of specific data blocks without reading through preceding data. They are also generally more durable than traditional hard drives because they have no moving parts. Thus, SSD Backup Disk is correctly paired with 'Fast random access, durable'.
Cloud Backup refers to storing digital data on servers managed by a third party, accessed over the internet. This description perfectly aligns with 'Remote, internet-based storage', as the data is stored off-site and accessed online.
DVDs (Digital Versatile Discs) are a type of optical media. They are relatively inexpensive to produce and use, but they are slower for both reading and writing compared to disk-based storage like SSDs or HDDs. They are often used for archiving data due to their low cost and stability when stored properly. Therefore, DVD Archive fits the description 'Cheap but slower, optical media'.
Based on these explanations, the correct matching is a-iv, b-ii, c-iii, and d-i.
Which of the following statements about email addresses is/are incorrect?
I. An email address must contain an '@' symbol.
II. An email address is case-sensitive (e.g., John@example.com is different from john@example.com).
III. There can only be one recipient in the "To" field of an email.