CCST Networking Troubleshooting Basics

1. Which layer of the OSI model handles physical transmission of bits over the network medium?

Layer 1 (Physical)

Layer 2 (Data Link)

Layer 3 (Network)

Layer 4 (Transport)

2. True or False: The loopback address (127.0.0.1) can be used to test network connectivity to remote hosts.

True

False

3. What does MTU (Maximum Transmission Unit) define in networking?

The maximum number of devices on a network

The largest packet size that can be transmitted

The maximum bandwidth available

The maximum number of hops in a route

4. Which command would you use to view the routing table on a Windows system?

Show route

Route print

Display routing

Netstat -r (or route print)

5. When troubleshooting, what is the first step in the logical troubleshooting process?

Implement a solution immediately

Gather information and identify the problem

Replace hardware components

Restart all network devices

6. True or False: ICMP is used exclusively for error reporting and diagnostic purposes.

True

False

7. Which of the following is a valid Class B private IP address range?

10.0.0.0 to 10.255.255.255

172.16.0.0 to 172.31.255.255

192.168.0.0 to 192.168.255.255

127.0.0.0 to 127.255.255.255

8. A host cannot reach another host on a different network. Which item should you verify first?

DNS settings

Default gateway configuration

Firewall rules

DHCP lease renewal

9. What does the netstat command help you identify?

Active connections and listening ports

Wireless signal strength

DHCP lease status

Router configuration

10. True or False: A default gateway is required for devices to communicate outside their local subnet.

True

False

11. Which OSI layer is responsible for logical addressing and routing decisions?

Layer 2 (Data Link)

Layer 3 (Network)

Layer 4 (Transport)

Layer 7 (Application)

12. What does DHCP provide to network clients automatically?

DNS server addresses only

IP address, subnet mask, gateway, and DNS

MAC address assignments

Firewall rules

13. Which tool traces the path a packet takes from source to destination?

Ping

Ipconfig

Tracert (or traceroute)

Netstat

14. True or False: A packet loss rate of 5% is generally considered acceptable for network performance.

True

False

15. What is the primary purpose of the ARP protocol?

Convert domain names to IP addresses

Map IP addresses to MAC addresses

Route packets between subnets

Encrypt network traffic

16. You suspect a network interface is not functioning. Which command displays MAC addresses and IP configurations?

Route print

Ipconfig /all

Arp -a

Getmac

17. Which protocol operates at Layer 4 and ensures reliable delivery of data?

UDP

TCP

IP

ICMP

18. What is the default subnet mask for a Class C private IP address?

255.255.0.0

255.255.255.0

255.0.0.0

255.255.255.128

19. A user cannot access a website. Which command would you use first to verify DNS is working?

Tracert

Nslookup

Ipconfig

Netstat

20. What does the ping utility primarily test in a network?

DNS resolution

IP connectivity and round-trip time

Port availability

Bandwidth capacity

CCST Networking Network Troubleshooting Basics Quiz

1. Which layer of the OSI model handles physical transmission of bits over the network medium?

2.

What first name or nickname would you like us to use?

2. True or False: The loopback address (127.0.0.1) can be used to test network connectivity to remote hosts.

3. What does MTU (Maximum Transmission Unit) define in networking?

4. Which command would you use to view the routing table on a Windows system?

5. When troubleshooting, what is the first step in the logical troubleshooting process?

6. True or False: ICMP is used exclusively for error reporting and diagnostic purposes.

7. Which of the following is a valid Class B private IP address range?

8. A host cannot reach another host on a different network. Which item should you verify first?

9. What does the netstat command help you identify?

10. True or False: A default gateway is required for devices to communicate outside their local subnet.

11. Which OSI layer is responsible for logical addressing and routing decisions?

12. What does DHCP provide to network clients automatically?

13. Which tool traces the path a packet takes from source to destination?

14. True or False: A packet loss rate of 5% is generally considered acceptable for network performance.

15. What is the primary purpose of the ARP protocol?

16. You suspect a network interface is not functioning. Which command displays MAC addresses and IP configurations?

17. Which protocol operates at Layer 4 and ensures reliable delivery of data?

18. What is the default subnet mask for a Class C private IP address?

19. A user cannot access a website. Which command would you use first to verify DNS is working?

20. What does the ping utility primarily test in a network?