System Administrator 2026 — Test 25

Correct Answer: C. C. Internet service provider
Explanation: The ISPs (Internet Service Providers) are the main agents through which every computer is connected to the internet. They are licensed to allot public IP addresses to its customers in order to connect them to the internet.

Correct Answer: B. B. Digital subscriber line
Explanation: DSL (Digital Subscriber Line) is the technology designed to use the existing telephone lines to transport high-bandwidth data to service subscribers. DSL was used to allow the early users access to the internet and it provides dedicated, point-to-point, public network access.

Correct Answer: A. A. Internet exchange point
Explanation: ISPs exchange internet traffic between their networks by using Internet Exchange Points. ISPs and CDNs are connected to each other at these physical locations are they help them provide better service to their customers.

Correct Answer: D. D. DNS, HTTP and DHCP
Explanation: HTTP is used to browse all the websites on the World Wide Web, DHCP is used to allot IPs automatically to the users on the internet, and DNS is used to connect the users to the host servers on the internet based on the Domain Name.

Correct Answer: B. B. 128 bits
Explanation: An IPv6 address is 128 bits long. Therefore, 2128 i.e. 340 undecillion addresses are possible in IPv6. IPv4 has only 4 billion possible addresses and IPv6 would be a brilliant alternative in case IPv4 runs out of possible new addresses.

Correct Answer: A. A. Packet switching
Explanation: Packet switching is the method based on which the internet works. Packet switching features delivery of packets of data between devices over a shared network.

Correct Answer: C. C. Resource reservation protocol
Explanation: Resource reservation protocol is a transport layer protocol used on the internet. It operates over IPv4 and IPv6 and is designed to reserve resources required by the network layer protocols.

Correct Answer: A. A. DHCP
Explanation: DHCP stands for Domain Host Control Protocol. It is responsible to remotely assign IP address to the clients connected to the internet. The server that performs this fuction is called the DHCP server.

Correct Answer: D. D. Packet switching
Explanation: Packet switching is not really related to media access control as it just features delivery of packets of data between devices over a shared network. Internet is actually based on packet switching.

Correct Answer: B. B. Udp
Explanation: The protocol field enables the demultiplexing feature so that the IP protocol can be used to carry payloads of more than one protocol type. Its most used values are 17 and 6 for UDP and TCP respectively. ICMP and IGMP are network layer protocols.