COS2626
EXAM PACK
,COMPUTER NETWORKS I - COS2626
AUGUST 2026 COMPREHENSIVE MOCK EXAM ANSWERS
Section 1: Multiple Choice
Question 1
Answer: B – IMAP4
Explanation: IMAP4 allows email messages to remain stored on the mail server while
users access and manage them from multiple devices. POP3 normally downloads
messages to the client.
Question 2A
Answer: B – Active Directory
Explanation: Active Directory is the centralized directory service used by Windows
Server to manage users, computers, groups, authentication and security policies.
Question 2B
Answer: A – Star
Explanation: In a star topology, each computer is connected to a central device such
as a switch.
Question 3
Answer: D – Presentation layer
Explanation: The OSI Presentation layer handles data formatting, translation,
compression and encryption.
Question 4
,Answer: A – Establish a theory of probable cause
Explanation: After gathering information and identifying symptoms, the technician
develops a theory about the most likely cause before testing or implementing a solution.
Question 5
Answer: D – Organizationally Unique Identifier (OUI)
Explanation: The first 24 bits of a MAC address identify the manufacturer or
organization assigned the address block.
Question 6
Answer: C – Flame-resistant jacket
Explanation: Cables installed in plenum spaces must have appropriate fire-
resistant/plenum-rated jackets to reduce the spread of fire and toxic smoke.
Question 7
Answer: A – 802.11ac
Explanation: 802.11ac operates in the 5 GHz band and supports gigabit-class wireless
speeds.
Question 8
Answer: D – 1.544 Mbps
Explanation: A standard T1 leased line provides a maximum data rate of 1.544 Mbps.
Question 9
Answer: B – Phishing
, Explanation: Phishing uses fraudulent messages, often email, that appear legitimate in
order to trick users into revealing credentials or other sensitive information.
Question 10
Answer: D – IaaS
Explanation: Infrastructure as a Service provides virtualized computing infrastructure
such as virtual machines, servers, networking and storage. The customer normally
manages the operating system.
Question 11
Answer: B – SOW (Statement of Work)
Explanation: An SOW describes the work to be performed, including tasks,
deliverables, standards, responsibilities and timelines.
Question 12
Answer: D – Connection-oriented
Explanation: TCP establishes a connection between communicating hosts and
provides reliable, ordered delivery. UDP is connectionless and does not provide the
same reliability mechanisms.
Question 13
Answer: C – Default Gateway
Explanation: The default gateway is the router/interface to which a host sends packets
destined for networks outside its local network.
Question 14
Answer: A – Attenuation
EXAM PACK
,COMPUTER NETWORKS I - COS2626
AUGUST 2026 COMPREHENSIVE MOCK EXAM ANSWERS
Section 1: Multiple Choice
Question 1
Answer: B – IMAP4
Explanation: IMAP4 allows email messages to remain stored on the mail server while
users access and manage them from multiple devices. POP3 normally downloads
messages to the client.
Question 2A
Answer: B – Active Directory
Explanation: Active Directory is the centralized directory service used by Windows
Server to manage users, computers, groups, authentication and security policies.
Question 2B
Answer: A – Star
Explanation: In a star topology, each computer is connected to a central device such
as a switch.
Question 3
Answer: D – Presentation layer
Explanation: The OSI Presentation layer handles data formatting, translation,
compression and encryption.
Question 4
,Answer: A – Establish a theory of probable cause
Explanation: After gathering information and identifying symptoms, the technician
develops a theory about the most likely cause before testing or implementing a solution.
Question 5
Answer: D – Organizationally Unique Identifier (OUI)
Explanation: The first 24 bits of a MAC address identify the manufacturer or
organization assigned the address block.
Question 6
Answer: C – Flame-resistant jacket
Explanation: Cables installed in plenum spaces must have appropriate fire-
resistant/plenum-rated jackets to reduce the spread of fire and toxic smoke.
Question 7
Answer: A – 802.11ac
Explanation: 802.11ac operates in the 5 GHz band and supports gigabit-class wireless
speeds.
Question 8
Answer: D – 1.544 Mbps
Explanation: A standard T1 leased line provides a maximum data rate of 1.544 Mbps.
Question 9
Answer: B – Phishing
, Explanation: Phishing uses fraudulent messages, often email, that appear legitimate in
order to trick users into revealing credentials or other sensitive information.
Question 10
Answer: D – IaaS
Explanation: Infrastructure as a Service provides virtualized computing infrastructure
such as virtual machines, servers, networking and storage. The customer normally
manages the operating system.
Question 11
Answer: B – SOW (Statement of Work)
Explanation: An SOW describes the work to be performed, including tasks,
deliverables, standards, responsibilities and timelines.
Question 12
Answer: D – Connection-oriented
Explanation: TCP establishes a connection between communicating hosts and
provides reliable, ordered delivery. UDP is connectionless and does not provide the
same reliability mechanisms.
Question 13
Answer: C – Default Gateway
Explanation: The default gateway is the router/interface to which a host sends packets
destined for networks outside its local network.
Question 14
Answer: A – Attenuation
