Khan Academy The Internet Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement best defines a distributed denial-of-service attack?
• Bailey creates a single computer that stores mappings from domain names to IP addresses. Which is a scalability flaw of this design?
• Why would a conference partner with multiple internet service providers?
• Why would a conference use two Internet service providers?
• What is caching in DNS and why is it important?
• When you receive a suspicious legal notice email, what is the safest way to verify its authenticity?
• Which threat involves redirecting users to fake sites by tampering with DNS or hosts files?
• Besides keeping software up to date, what is another recommended practice to reduce malware risk?
• Which cryptanalytic technique is commonly used to crack traditional ciphers?
• Which statement correctly describes the IPv4 private address space (such as 192.168.x.x)?
• What can antivirus software protect computers from?
• What is the purpose of DNS in browsing?
• What is the main advantage of the IPv6 addressing protocol?
• What is the main purpose of a trusted certificate in secure communications?
• Which statement best describes the Domain Name System (DNS)?
• Which option is a valid IPv6 address example?
• Why does generating a public/private key pair take a long time in public key cryptography?
• An IP address such as 192.168.17.43 is typically what kind of address?
• Which statement best describes a Content Delivery Network (CDN) and why it is used?
• Which protocol is used by the browser to fetch the content for the page at http://wolverinefoundation.org/?
• Which type of data is stored on devices or servers?
• TLS certificates help establish trust by?
• Which explanation most likely describes how the 2000 Yahoo DDoS attack disrupted service?
• If a DNS record's TTL expires, what happens?
• Which mechanism helps DNS scalability by caching domain ↔ IP mappings on multiple machines?
• What is the best description of how HTTPS combines protocols?
• What does a 404 status code indicate?
• The DDoS attack described had traffic peaking at 60 Gbps. What does that indicate about the attack?
• Jelani's Somalia school has 400 kbps download speed, while the Oakland home has 60 Mbps. How many times faster is the Oakland download?
• Which statement correctly describes the main components of a URL?
• How did the ISP likely know about the illegal downloading?
• What does the same-origin policy regulate in web security?
• In an online game scenario, what is the most likely reason why a player's actions don't register while opponents' actions do?
• What is the Transmission Control Protocol (TCP) responsible for?
• In two-factor authentication, which option describes the required verification factors?
• Which statement best describes incognito or private browsing?
• How does a subdomain relate to its parent domain?
• Data at rest versus data in transit refers to which distinction?
• A central mapping computer (for DNS-like service) presents a reliability issue. Which statement correctly identifies a reliability flaw?
• What information does a typical data packet contain?
• Why can't we rely on the symmetric encryption schemes used 1000 years ago or 100 years ago?
• Which statement about IP addresses is true?
• Imagine the Internet without the Domain Name System (DNS). What would be true?
• What is a data cap and how can it affect you?
• Sort this list of historical modems from lowest to highest bandwidth, with the lowest on the top and the highest on the bottom.
• Which technology has the highest bandwidth among the following options?
• Which statement best describes how public-key encryption maintains confidentiality?
• Which statement best describes how TCP/IP sends data around the Internet?
• What is the main purpose of a CDN for a global audience?
• In end-to-end encryption, who cannot read the messages?
• What is the main goal of establishing an encrypted communication channel between two computers?
• Which error indicates that a domain name could not be resolved?
• What is the top-level domain in the domain donorschoose.org?
• If any single connection can fail, how many independent routes exist between San Diego and Illinois?
• Which best describes the fault tolerance of routing on the Internet?
• What happens if DNS cannot resolve a domain name?
• What makes a strong password?
• What was the likely effect of the DDoS attacks on the major banking websites described, with traffic peaking at 60 Gbps?
• Which metaphor best describes the domain name system to a young child?
• Which statement best explains what a digital certificate ties together?
• What is the primary function of the Domain Name System (DNS) in the Internet?
• What is the difference between an ISP and a router?
• Why are software updates important for Internet security?
• What is the difference between HTTP and HTTPS?
• Mbps stands for which of the following?
• What is malware and how can you reduce risk?
• What is a common use of cookies in web interactions?
• Why did Taylor's IP address change after switching from AT&T to Verizon?
• Which statement accurately describes the role of IP in the Internet Protocol Suite?
• Why would cyber criminals DNS spoof a cryptocurrency website?
• Why does using multiple random words with mixed casing improve password strength?
• Which statement about private browsing is accurate?
• In the historical modem list, which modem has the highest bandwidth?
• What is the primary purpose of the sequence number in IP packets?
• In public key cryptography, how are the two keys used?
• What is the primary purpose of an IP address on a network?
• What does a 200 status code indicate?
• In 1986, NSFNET connected 6 university departments across the US. How many routes exist between NCAR and JVNC if any connection can fail?
• As of October 2018, what was the IPv6 adoption rate in the United States?
• Why do we use domain names in the Internet?
• How can you identify trustworthy websites?
• What is TLS/SSL and why is it important for security?
• Which arrangement helps DNS scale by distributing responsibilities among root name servers, TLD name servers, and host name servers?
• What is a packet and what happens to it on a network?
• What is a good explanation of the DNS spoofing attack described in the material?
• What is a firewall and how does it help security?
• What is a potential outcome if Jaime had submitted the password reset form on the phishing site?
• Which statement about DNS caching is true?
• Computer A wants to send data to Computer B using TCP/IP. Which sequence best describes how this works?
• Which country had 25.7% IPv6 adoption as of October 2018?
• Which of the following WAN technologies has the lowest bandwidth?
• What is a web API?
• What is the main benefit of redundancy in a network with multiple routes between endpoints?
• Nadia's download speed is 600 kbps and Jun's is 60 Mbps. How many times faster is Jun's speed than Nadia's?
• Which password choice demonstrates the strongest protection?
• In the IPv4 address 169.237.121.44, which part identifies the campus computer?
• What does the SSL/TLS certificate prove about a website?
• Which operation is an example of computationally intensive cryptographic work?
• Which DNS concept maps a domain name to an IP address?
• Which country had an IPv6 adoption rate of 0.2% as of October 2018?
• Emily's home computer experienced a power outage and later regained power. Kolby can no longer send messages to Emily's server. What is the most likely explanation?
• In the client-server model, what is the role of a web server?
• What is a DNS resolver and what does it do?
• What is the Internet Protocol (IP) responsible for?
• Which statement most accurately describes phishing?
• By comparing a 1 Gigabit per second fiber connection in San Francisco to a 500 kilobits per second connection in Pakistan, how many times faster is the SF office connection?
• How does router-by-router next-hop decision increase routing fault tolerance?
• What is a password manager?
• Which statement describes the relationship between domain names and IP addresses?
• When a browser loads a webpage from https://www.charitywater.org/, which sequence best describes what happened?
• What is the purpose of the destination address in an IP packet?
• What is ransomware?
• Who issues and signs the website's certificate in public key infrastructure?
• Which statement best describes the purpose of TLS/SSL?
• If a user disables all cookies, which website feature is most likely to stop functioning correctly?
• Identify a valid IPv6 address from the options.
• What is a web session and how are cookies involved?
• How are cookies involved in web sessions?
• Which element is commonly found on trustworthy websites to indicate privacy practices?
• How do bandwidth and latency affect Internet performance?
• For the described three-step symmetric encryption (in-word letter swap, A/E swap, then a Caesar shift of 14), what would be the best key to explain the method to a friend?
• In public key cryptography, what information must the sender obtain from the recipient before sending data securely?
• Redundancy in a network makes it more fault-tolerant. What is the purpose of redundancy?
• An intranet is a private network set up for an organization. Which statement is true?
• Which statement about public-key cryptography is true?
• Identify a valid IPv4 address from the options.
• Which protocol is responsible for reliable transmission of data across a network?
• Which statement best describes an intranet?
• What is a cookie and why is it used?
• What is ethical use of the Internet?
• Which statement about IP packets is true?
• Why does each IP packet contain a sequence number?
• In the Caesar cipher example, which step is the final encryption step?
• What is TTL in DNS, and how does it affect resolution?
• What is DNS and what problem does it solve?
• What does end-to-end encryption mean in messaging apps?
• Which action would NOT reduce the risk of exposing geolocation data when using social media?
• What does a 500 status code indicate?
• What is the role of randomness in cryptographic processes?
• What is the purpose of the TCP three-way handshake?
• What is the primary purpose of WAN technologies?
• In a network with multiple possible routes between two points, redundancy creates fault tolerance. How many routes exist between NCAR and JVNC?
• How do HTTP cookies differ from web beacons or tracking pixels?
• Which privacy setting helps reduce tracking?
• In an IP network, which field helps computers reorder packets that arrive out of order?
• Which statement accurately describes LTE and Wi‑Fi and how they differ in influencing browsing?
• Which URL among the following was loaded over a secure HTTPS connection in the example?
• Which of the following could be a valid IP address? (Only one is valid.)
• What does HTTP stand for?
• Which statement describes the goal of the same-origin policy?
• Which router must stay available to ensure GameCon has a working connection to the internet?
• Which resource is an example of a script loaded by a webpage for interactivity?
• Which latency claim makes sense for an online ad server?
• What action is best to verify a suspicious email from a law firm about a court notice?
• What did Geofeedia claim about the data they sold?
• Which of the following is the correct unit for upload speed?
• TCP/IP are the protocols that route data around the internet. What are they responsible for?
• What role does a router play in sending data across the Internet?
• Why is it important to encourage countries and their Internet Service Providers to upgrade to IP v6?
• In the IPv4 address 24.128.139.211, which part identifies the network?
• Who issues digital certificates?
• In two-factor authentication, which item serves as 'something you have'?
• Which password practice reflects best current practices for strong authentication?
• What happens in a browser when you enter a URL?
• Which browser cues indicate that a connection to a website is secure?
• Which of the following is NOT a component of a URL?
• What is a digital certificate and who issues it?
• In IP routing, how do routers determine where a packet needs to go?
• What is the best explanation for why connecting to a regional Agar server might reduce lag?
• What information is typically found in the header of a data packet?
• Which process maps a domain name to an IP address?
• What is a subdomain, in network terms?
• Redundancy in a network makes it more fault-tolerant. When two computers are connected by multiple routes, what effect does this have?
• Which statement best describes an intranet's security and fault tolerance?
• Why are IPv4 addresses more expensive to lease recently?
• Public-key cryptography can be used for digital signatures, which primarily offer which security property?
• Which of the following is a valid IPv6 address?
• What types of encryption are used in the TLS protocol to ensure secure communication between a client and server?
• In a network with two Internet service providers and several routers, there is a single point of failure. Which router must stay online to maintain an Internet connection?
• What is a vulnerability of using HTTP without encryption?
• In the path of delivering a packet, what is the role of the nearest router?
• Which statement is true about the domain eecs.berkeley.edu?
• Which statement about how a web server responds to requests is true?
• What is the primary purpose of a packet's destination address?
• Which statement describes the difference between a URL and a hyperlink?
• Which data format is commonly used in web APIs?
• Which of the following statements best describes the Domain Name System (DNS)?
• What is the primary purpose of an IP address?
• What best defines a data breach?
• When a user types a domain name into a browser, which system resolves it to an IP address?