A network administrator is troubleshooting a connectivity issue. A device has IP address 172.20.15.10 with a default Class B mask. The device cannot reach the internet. The administrator suspects the address is private. Which statement is true?

The address is public and should be routable on the internet.

The address is in the private range 172.16.0.0/12 and requires NAT for internet access.

The address is a Class C address and is public.

The address is a link-local address and cannot be routed.

Which statement best describes a public IPv4 address?

It is only used for internal communication within a private network.

It is assigned by the local network administrator and can be reused across different networks.

It is automatically assigned to every device on a network.

It is globally unique and routable on the public internet.

What is a key characteristic of private IPv4 addresses?

They are used for internal networks and are not routable on the public internet.

They can be routed on the internet if the ISP allows it.

They are globally unique and assigned by IANA.

They are assigned by DHCP servers only.

CiscoCertified Support Technician (CCST) Networking

Domain 2Objective 1

2.1. Compare and Contrast Private Addresses and Public Addresses. 100-150 Practice Questions (Page 2)

Part of the Addressing and Subnet Formats domain, which makes up ~11% of our current practice bank. Cisco does not publish an official question count, but from its 50-minute exam (~20–35 total, ~2–4 in this domain), expect 1–1 from this objective — we provide 36 practice questions to prepare you well beyond it. (estimate)

36questions here

8free pages

5concepts

Questions 6–10

6application · medium
A network engineer is reviewing a legacy network design document that references a Class B address. Which default subnet mask is associated with a Class B address?
Select an answer first
7application · medium
A company is designing an internal network and wants to use a private IP range that provides the most host addresses for future growth. Which range should they choose?
Select an answer first
8expert · hard
A network administrator is troubleshooting a connectivity issue. A device has IP address 172.20.15.10 with a default Class B mask. The device cannot reach the internet. The administrator suspects the address is private. Which statement is true?
Select an answer first
9foundation · easy
Which statement best describes a public IPv4 address?
Select an answer first
10foundation · easy
What is a key characteristic of private IPv4 addresses?
Select an answer first

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2.1. Compare and Contrast Private Addresses and Public Addresses. 100-150 Practice Questions (Page 2)

Questions 6–10

A network engineer is reviewing a legacy network design document that references a Class B address. Which default subnet mask is associated with a Class B address?

A company is designing an internal network and wants to use a private IP range that provides the most host addresses for future growth. Which range should they choose?

A network administrator is troubleshooting a connectivity issue. A device has IP address 172.20.15.10 with a default Class B mask. The device cannot reach the internet. The administrator suspects the address is private. Which statement is true?

Which statement best describes a public IPv4 address?

What is a key characteristic of private IPv4 addresses?

Keep studying — Addressing and Subnet Formats