Bài thi cuối khóa

Which layer of the OSI model is responsible for routing packets between different networks?

• Network Layer

• Transport Layer

• Application Layer

• Session Layer

Which port below is the default port for the DNS service?

• 53

• 80

• 25

• 161

Which two protocols are most commonly used by the AAA protocol?

• RADIUS and TACACS+

• FTP and TFTP

• HTTP and HTTPS

• SNMP and NTP

Why can't a Layer 3 Switch completely replace a Router in some cases?

• Because it cannot handle VLANs

• Because it cannot perform NAT (Network Address Translation)

• Because it does not support routing protocols

• Because it cannot connect to end devices

Select all protocols that operate at the Application layer of the OSI model:

• DNS

• DHCP

• HTTPS

• ICMP

Which of the following characteristics is NOT true for the TCP protocol?

• Provides connectionless communication

• Ensures data arrives in order

• Uses a three-way handshake to establish a connection

• Can detect and correct data errors

What tasks is the Network layer responsible for? (Select two)

• Routing

• Fragmentation and reassembly of data

• Traffic control

• Establishing end-to-end connections

What is the network address of 192.168.10.140 with a subnet mask of 255.255.255.240?

• 192.168.10.128

• 192.168.10.144

• 192.168.10.0

• 192.168.10.140

In a Class B network ( /16) with a subnet mask of 255.255.255.0, how many usable subnets are there?

• 128

• 256

• 512

• 1024

Which subnet does the IP address 192.168.1.100/27 belong to?

• 192.168.1.0

• 192.168.1.64

• 192.168.1.96

• 192.168.1.128