CIW Network Technology Associate 4 — Questions and Answers
Question 1: Which protocol is used to synchronize clocks across network devices and is critical for authentication protocols like Kerberos?
- SNMP
- NTP (Correct answer)
- LDAP
- RADIUS
Correct answer: NTP
NTP (Network Time Protocol) synchronizes clocks across network devices; accurate time is essential for authentication tickets, logs, and certificates.
Question 2: What is the maximum segment length for a standard 1000BASE-T (Gigabit Ethernet over copper) connection?
- 185 meters
- 500 meters
- 100 meters (Correct answer)
- 550 meters
Correct answer: 100 meters
1000BASE-T supports a maximum cable segment length of 100 meters using Cat 5e or higher UTP cabling.
Question 3: A company needs to connect two geographically separated offices over the public Internet while maintaining data confidentiality. Which technology is most appropriate?
- VLAN trunking
- VPN (Virtual Private Network) (Correct answer)
- SNMP monitoring
- Port mirroring
Correct answer: VPN (Virtual Private Network)
A VPN creates an encrypted tunnel over the public Internet, ensuring data confidentiality between remote sites.
Question 4: Which field in an IPv4 packet header is decremented by each router and causes the packet to be discarded when it reaches zero?
- Protocol
- Time to Live (TTL) (Correct answer)
- Header Checksum
- Differentiated Services
Correct answer: Time to Live (TTL)
The TTL (Time to Live) field is decremented by 1 at each hop; when it reaches 0, the router discards the packet and sends an ICMP Time Exceeded message.
Question 5: What is the primary role of ICMP in TCP/IP networking?
- Assign IP addresses dynamically
- Provide error reporting and network diagnostics (Correct answer)
- Establish reliable end-to-end sessions
- Resolve domain names to IP addresses
Correct answer: Provide error reporting and network diagnostics
ICMP (Internet Control Message Protocol) provides error reporting (e.g., destination unreachable) and diagnostic functions used by tools like ping and traceroute.
Question 6: In wireless networking, what does the term 'SSID' refer to?
- The encryption key used to protect the wireless signal
- The network name broadcast by a wireless access point (Correct answer)
- The channel frequency assigned to a wireless radio
- The MAC address of the wireless access point
Correct answer: The network name broadcast by a wireless access point
The SSID (Service Set Identifier) is the human-readable name that identifies a wireless network and is broadcast in access point beacon frames.
Question 7: Which Layer 2 protocol is used to carry multiple VLAN traffic over a single trunk link between switches?
- STP
- 802.1Q (Correct answer)
- PPP
- LACP
Correct answer: 802.1Q
IEEE 802.1Q (dot1q) adds a 4-byte VLAN tag to Ethernet frames, enabling multiple VLANs to share a single trunk link between switches.
CIW Network Technology Associate 4
Which protocol is used to synchronize clocks across network devices and is critical for authentication protocols like Kerberos?