Chapter 5: Error Review & Mock Test

Key Vocabulary

Focus on weak spots, not an even re-read of everything. This is the last step after finishing Chapters 1–4.

中文快速導讀：本章用來找出自己真正不會的地方。每次錯題先記錄原因，再回到相應章節重做相似題；不要只背選項。英文題幹看不懂時，先找技術名詞及題目動詞，例如 used by（用於）、stands for（代表甚麼）、result（結果）、which layer（哪一層）。

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1. Error Log（錯題記錄表，自行填寫）

Review loop（複習流程）: wrong answer → identify the cause → revisit the matching chapter → retry a similar question. Do NOT just "get it wrong → memorize the correct option" — that fails the moment the question is phrased differently.

Error categories（錯誤分類，記錄時挑一種最貼近的原因）:

1. Concept Gap（觀念缺漏）— you simply didn't know this
2. Confusion（概念混淆）— mixed up two similar concepts
3. Careless Mistake（粗心）— you knew it, but misread or mis-clicked
4. Vocabulary Problem（詞彙問題）— didn't understand the wording, not the concept
5. Reasoning Error（推理錯誤）— the logic chain broke down
6. Calculation Error（計算錯誤）— miscalculated a subnet mask, conversion, etc.
7. Misread Question（誤讀題目）— missed a "not," or a key word

The same category repeating is a weak spot — go reread that chapter, don't re-read the whole set.

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2. Timed Buzzer Drill（限時快問快答特訓，30 題）

Cover the right column, 10 seconds per question（模擬決賽搶答節奏）, practice until instant.

中文作法：先用紙或手遮住右欄答案；每題 10 秒內說出答案。若連題意也看不懂，先到下方「英文題幹速查」找相近問法，再返回本題。

英文題幹速查（快速理解題目）

Tie-breaker Level Practice（決勝題等級練習，需要計算或深度記憶）

1. Subnet mask calculation: a network needs to fit 60 devices — minimum subnet mask? Answer: 255.255.255.192 (/26), since 2⁶−2=62 ≥ 60.
2. Same, but for 200 devices? Answer: need n where 2ⁿ−2 ≥ 200 → n=8 (2⁸−2=254), network bits = 32−8=24, i.e. 255.255.255.0 (/24).
3. ES6 release year? (Answer: 2015)
4. 5 ^ 3 (XOR) result? (hint: convert to binary 101 ^ 011) (Answer: 6)

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3. Mixed Flashcard Pool（混合快閃卡題庫，80 題，來源：NotebookLM）

Don't do all 80 in one sitting — pull 10–15 a day for spaced review（Same Lesson Review → Next Lesson Review → 3-Day Review → 7-Day Review → final pre-exam review）. This sticks far better than one big cram session.

中文提示：不要一次做完 80 題。每天抽 10–15 題；同課後重溫一次、下一課再看、3 日後、7 日後及考前再看。遇到英文題幹，可先判斷它是在問「名稱、功能、數值、快捷鍵、協定還是層級」。

Click to expand all 80 (cover the right column and answer first)

#	Question / 題目	Answer / 答案
1	Network covering a city-wide area is called?	Metropolitan Area Network (MAN)（都會網絡）
2	OSI layer that establishes, maintains, and tears down connections?	Transport layer
3	A channel where both sides send/receive simultaneously?	Full-duplex channel
4	Basic data unit at the Data Link layer?	Frame
5	How many bits in a MAC address?	48 bits
6	Ethernet address used to identify source/destination?	MAC address
7	IP protocol's service is unreliable and?	Connectionless（無連接）
8	Protocol that resolves IP address to MAC address?	ARP
9	Besides Ping, ICMP is also used for?	Traceroute
10	Routing protocols within one autonomous system are collectively called?	Interior Gateway Protocol (IGP)
11	RIP's metric for measuring a path?	Hop count
12	TCP flow control mechanism?	Sliding window
13	How many handshakes to establish a TCP connection?	Three
14	DNS's default transport protocol and port?	UDP 53
15	HTTP's default TCP port?	80
16	What should you wear when working inside a PC to prevent ESD?	Anti-static wristband
17	Most common consumer PC power supply form factor?	ATX12V
18	Chipset controlling high-speed RAM/GPU access?	Northbridge
19	CPU socket type with pins on the socket, not the package?	LGA
20	Volatile temporary working memory?	RAM
21	RAM technology that detects and corrects single-bit errors?	ECC
22	What medium does an SSD mainly use to store data?	NAND Flash
23	RAID level with 100% redundancy but only 50% space efficiency?	RAID 1
24	Port that carries high-res video and multi-channel audio together?	HDMI
25	Function of a KVM switch?	Control multiple computers with one keyboard/screen/mouse
26	Tool for viewing hardware status and updating drivers?	Device Manager
27	Windows 10 shortcut to lock the screen instantly?	Win + L
28	Main feature NTFS adds over FAT32?	Security (permissions) and large-file support
29	10 // 3 result?	3
30	10 % 3 result?	1
31	False and True result?	False
32	Method auto-called when a Python object is created?	__init__()
33	Python library for scientific computing / multi-dim arrays?	numpy
34	Excel shortcut to fill a selected range with the same content?	Ctrl + Enter
35	=LEN("AI Tools") return value?	8
36	Word shortcut for a new blank document?	Ctrl + N
37	PowerPoint shortcut to play from the current slide?	Shift + F5
38	What is a zero-day vulnerability?	Discovered but not yet patched by the vendor
39	Trojan vs virus — the Trojan lacks what capability?	Self-replication
40	Digital signature ensures integrity, authenticity, and?	Non-repudiation
41	Main goal of a DoS attack?	Exhaust resources so legitimate users can't access the service
42	What security feature does BitLocker provide?	Full-disk encryption
43	AAA stands for Authentication, Authorization, and?	Accounting
44	Social engineering mainly exploits what weakness?	Human psychology / trust
45	Decimal 15 to hex?	F
46	Raspberry Pi CPU's instruction set architecture?	ARM
47	Abbreviation for graphics-card-specific high-speed memory?	GDDR
48	HTML tag for a multi-line text input area?	<textarea>
49	Space between Border and Content in the CSS Box Model?	Padding
50	CSS to hide a hyperlink's underline?	text-decoration: none;
51	JS == vs === — the latter also compares?	Type
52	Abbreviation for Alibaba's cloud VM service?	ECS
53	Name of Huawei's self-developed LLM?	Pangu
54	Name of Baidu's deep learning platform?	PaddlePaddle
55	DJI's core business?	Drone technology
56	Default subnet mask for a Class C address?	255.255.255.0
57	Network-layer protocol for dynamic IP assignment?	DHCP
58	Common TCP port for SSH?	22
59	SMTP is mainly used for email?	Sending (transmission)
60	What's a tape drive mainly used for today?	Long-term backup / archival
61	What hardware does NVMe mainly optimize transfer speed for?	SSDs
62	Cooling using only a heatsink, no fan, is called?	Passive cooling
63	Command to check and fix disk errors?	chkdsk
64	Excel notation to reference the whole column E?	E:E
65	Malware that encrypts user files and demands payment?	Ransomware
66	OSI layer responsible for compression and encryption?	Presentation layer
67	Shortest Ethernet frame length?	64 bytes
68	IPv6 address length?	128 bits
69	Routing algorithm that broadcasts to all neighbors and converges fast?	Link-State routing (LS)
70	How many "waves" to close a TCP connection?	Four
71	What protocol does HTTPS add on top of HTTP?	SSL or TLS
72	What chip usually stores BIOS settings?	CMOS
73	Smallest common motherboard form factor?	ITX (Mini-ITX)
74	Small, fast on-CPU memory for staging instructions/data?	Cache
75	RAM technology that needs periodic refresh circuits to retain data?	DRAM
76	SATA 3.0's max theoretical transfer rate?	6 Gb/s
77	Excel fill-down shortcut?	Ctrl + D
78	What operation does ^ represent in Python?	XOR
79	Device that isolates collision domains but not broadcast domains?	Switch
80	TCP/IP model's "Internet layer" corresponds to which OSI layer?	Network layer

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4. Final Pre-Exam Checklist（考前最後檢查）

中文提示：以下清單不是要全部「看過」，而是要能夠遮住資料後自己答出來；任何一項做不到，就回到對應章節。

• Can recall most of Chapter 1's quick-reference tables from memory
• Can redraw all four Chapter 2 diagrams (OSI / subnet calc / cloud models / number conversion) without looking
• Can instantly tell apart every pair in Chapter 4's confusable-concept table
• No single error category in the error log has repeated three or more times
• Can finish all 30 questions of the timed buzzer drill (Section 2) within 5 minutes