DNS Servers and Caching
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Questions and Answers

Which of the following best describes DNS?

  • A method for translating URLs to IP addresses (correct)
  • A method for encrypting internet traffic
  • A method for managing internet connections
  • A method for translating IP addresses to URLs

    • What is the purpose of a DNS server?

  • To manage internet connections
  • To translate IP addresses to URLs
  • To translate URLs to IP addresses (correct)
  • To encrypt internet traffic

    • What does URL stand for?

  • Universal Remote Locator
  • Uniform Resource Locator (correct)
  • Unique Resource Link
  • User Requested Link

    • What does the scheme in a URL indicate?

    <p>The protocol the browser must use to request the resource</p> Signup and view all the answers

    What is the fundamental need behind DNS?

    <p>To remember IP addresses</p> Signup and view all the answers

    What is the role of the domain name in a URL?

    <p>To represent the city or town</p> Signup and view all the answers

    What does the path in a URL represent?

    <p>The building where the resource should be delivered</p> Signup and view all the answers

    Which protocol is commonly used for websites?

    <p>HTTPS</p> Signup and view all the answers

    What character pattern separates the authority from the scheme in a URL?

    <p>://</p> Signup and view all the answers

    What does the domain indicate in a URL?

    <p>Web server location</p> Signup and view all the answers

    What does the path to a resource represent in a URL?

    <p>Physical file location on the Web server</p> Signup and view all the answers

    What is the purpose of parameters in a URL?

    <p>To provide extra information to the Web server</p> Signup and view all the answers

    What does an anchor represent in a URL?

    <p>A bookmark within the resource</p> Signup and view all the answers

    What is the purpose of the Root Hint in DNS?

    <p>To indicate the start of the DNS lookup process</p> Signup and view all the answers

    Which type of record is required for all DNS zones?

    <p>Start of Authority (SOA)</p> Signup and view all the answers

    What is the purpose of caching in DNS servers?

    <p>To store DNS records for faster resolution</p> Signup and view all the answers

    Which component is considered the single most important in Active Directory?

    <p>DNS server</p> Signup and view all the answers

    What is the role of DNS in Active Directory?

    <p>To enable components to find each other</p> Signup and view all the answers

    Which type of DNS record is used to provide the IP address of the closest resource based on geographical location?

    <p>Geo-Location Based Traffic Management</p> Signup and view all the answers

    What is the purpose of split-brain DNS?

    <p>To split DNS records into different Zone Scopes on the same DNS server</p> Signup and view all the answers

    What is the responsibility of DHCP?

    <p>Assigning IP addresses to computers</p> Signup and view all the answers

    Which role is not included by default when setting up a Windows Server Active Directory Domain?

    <p>DHCP Server</p> Signup and view all the answers

    What is the purpose of a subnet mask?

    <p>To divide the network</p> Signup and view all the answers

    What is the function of a DNS server?

    <p>To resolve domain names to IP addresses</p> Signup and view all the answers

    What is a default gateway?

    <p>The IP address of the next hop router</p> Signup and view all the answers

    What does the Windows DHCP Server Role provide?

    <p>All of the above</p> Signup and view all the answers

    What is the process called between the client and server to negotiate a DHCP address?

    <p>DORA</p> Signup and view all the answers

    What is the purpose of DHCP reservations?

    <p>To issue the same reserved IP address to a client</p> Signup and view all the answers

    What does the acronym DORA stand for in the DHCP process?

    <p>Discover, Offer, Request, Acknowledge</p> Signup and view all the answers

    What are the built-in resilience options for a Windows DHCP Server?

    <p>Split-Scope DNS, DHCP Failover</p> Signup and view all the answers

    DNS stands for the Dynamic Name System.

    <p>False</p> Signup and view all the answers

    URL stands for Uniform Resource Locator.

    <p>True</p> Signup and view all the answers

    DNS is responsible for translating IP addresses to domain names.

    <p>True</p> Signup and view all the answers

    The scheme in a URL represents the protocol that the browser must use to request the resource.

    <p>True</p> Signup and view all the answers

    The path in a URL represents the building where your mail should be delivered.

    <p>True</p> Signup and view all the answers

    The anchor in a URL represents the actual person to whom you've addressed your mail.

    <p>False</p> Signup and view all the answers

    Caching in DNS servers is used to store IP addresses for faster retrieval.

    <p>True</p> Signup and view all the answers

    True or false: The protocol used for websites is usually HTTPS or HTTP.

    <p>True</p> Signup and view all the answers

    True or false: The authority in a URL includes both the domain and the port.

    <p>True</p> Signup and view all the answers

    True or false: The path to a resource in a URL represents a physical file location on the web server.

    <p>False</p> Signup and view all the answers

    True or false: Parameters in a URL are a list of key/value pairs separated by commas.

    <p>False</p> Signup and view all the answers

    True or false: An anchor in a URL represents a sort of 'bookmark' inside the resource.

    <p>True</p> Signup and view all the answers

    True or false: The root hint is the start of the DNS lookup process.

    <p>True</p> Signup and view all the answers

    True or false: The TLD server is responsible for a specific subset of domains.

    <p>True</p> Signup and view all the answers

    True or false: DNS servers serve the purpose of caching to speed up the DNS resolution process?

    <p>True</p> Signup and view all the answers

    True or false: All Active Directory Domains must have a DNS server?

    <p>True</p> Signup and view all the answers

    True or false: Active Directory will not function without a DNS server?

    <p>True</p> Signup and view all the answers

    True or false: DNS Policies are an advanced topic that is only necessary for managing large enterprise environments?

    <p>True</p> Signup and view all the answers

    True or false: Load balancing can be achieved using DNS policy to dynamically allocate traffic load for an application?

    <p>True</p> Signup and view all the answers

    True or false: Split-brain DNS allows DNS records to be split into different Zone Scopes on different DNS servers?

    <p>False</p> Signup and view all the answers

    True or false: DHCP is responsible for assigning IP addresses to computers and providing DNS server address information?

    <p>True</p> Signup and view all the answers

    The DHCP server is included by default when setting up a Windows Server Active Directory Domain.

    <p>False</p> Signup and view all the answers

    The DHCP server role can be installed as an additional role in Windows Server.

    <p>True</p> Signup and view all the answers

    The subnet mask 255.255.255.0 (or /24) is the most commonly used subnet mask.

    <p>True</p> Signup and view all the answers

    DNS Servers are sent out to clients via DHCP in an organization.

    <p>True</p> Signup and view all the answers

    The default gateway is the IP address of the router that allows your host to navigate the network.

    <p>True</p> Signup and view all the answers

    DHCP minimizes configuration errors caused by manual IP address configuration.

    <p>True</p> Signup and view all the answers

    DHCP allows for centralized and automated TCP/IP configuration.

    <p>True</p> Signup and view all the answers

    The DHCP process is known as DORA.

    <p>True</p> Signup and view all the answers

    DHCP reservations ensure that the same reserved IP address is issued to the client based on their MAC address.

    <p>True</p> Signup and view all the answers

    DNS is a fundamental component of the ______.

    <p>internet</p> Signup and view all the answers

    DNS stands for the Domain ______ ______.

    <p>Name System</p> Signup and view all the answers

    A DNS Server helps translate the ______ of the website (i.e. www.google.ca) to an IP Address.

    <p>URL</p> Signup and view all the answers

    A URL stands for Uniform Resource ______.

    <p>Locator</p> Signup and view all the answers

    The scheme represents the ______ service you want to use (FedEx, UPS).

    <p>postal</p> Signup and view all the answers

    The domain name is the ______ or town.

    <p>city</p> Signup and view all the answers

    The path represents the ______ where your mail should be delivered.

    <p>building</p> Signup and view all the answers

    DNS is based on a distributed system of ______, and sending requests to each.

    <p>Name Servers</p> Signup and view all the answers

    The period at the end of the URL is a ______ hint.

    <p>root</p> Signup and view all the answers

    The Root Hint is the ______ of the DNS lookup process.

    <p>start</p> Signup and view all the answers

    A '______ DNS lookup' is the most basic DNS lookup, where DNS servers will talk between each other to point you to where you can find the resource.

    <p>Iterative</p> Signup and view all the answers

    The second step in the DNS Recursive Lookup/resolution process is to consult with the ______ Server.

    <p>TLD</p> Signup and view all the answers

    TLD Stands for ______.

    <p>Top Level Domain</p> Signup and view all the answers

    The ______ Nameserver is the last and final step in the recursive name resolution process.

    <p>Authoritative</p> Signup and view all the answers

    DNS Servers contain records. Records are stored in _______

    <p>Zones</p> Signup and view all the answers

    The DNS Server for (on-premises) Active Directory is an internal DNS server that enables all the components to find each other. The role of DNS in Active Directory – Cont’d Active Directory will NOT function without a DNS ________

    <p>server</p> Signup and view all the answers

    Clients must use the Internal DNS server to be able to join the Active Directory and to access internal resources. The Internal DNS server also doubles as a caching _______ server

    <p>DNS</p> Signup and view all the answers

    The DNS Server role is automatically installed as part of the domain creation process – if you don’t have one Another DNS server may also be used, however your Domain Controller must be able to write _______ to it

    <p>records</p> Signup and view all the answers

    DNS Policies are an advanced topic that you should familiarize yourselves with. You will absolutely need to use it if you are managing a large enterprise environment. Most of the administration is done via _______

    <p>PowerShell</p> Signup and view all the answers

    When you have deployed multiple instances of an application at different locations, you can use DNS policy to balance the traffic load between the different application instances, dynamically allocating the traffic load for the _______

    <p>application</p> Signup and view all the answers

    You can use DNS Policy to allow primary and secondary DNS servers to respond to DNS client queries based on the geographical location of both the client and the resource to which the client is attempting to connect, providing the client with the IP address of the closest _______

    <p>resource</p> Signup and view all the answers

    The DHCP server is not included by default when setting up a Windows Server Active Directory Domain, however can be installed as an additional ______.

    <p>role</p> Signup and view all the answers

    You will be exploring this setup in the ______ course.

    <p>NTWK-8050</p> Signup and view all the answers

    IP Address: The computers 'Internet Protocol' address, this is how other devices talk with your ______.

    <p>computer</p> Signup and view all the answers

    Subnet Mask: Is a subdivision of the ______.

    <p>network</p> Signup and view all the answers

    DNS Server: As you are aware, DNS Servers are also sent out to via DHCP to the clients in your ______.

    <p>organization</p> Signup and view all the answers

    Default Gateway: is the IP Address of the 'next hop' router that allows your host to navigate the ______.

    <p>network</p> Signup and view all the answers

    The Windows DHCP Server Role allows for some ______.

    <p>flexibility</p> Signup and view all the answers

    Reliable IP address configuration. DHCP minimizes configuration errors caused by manual IP address configuration, such as typographical errors, or address conflicts caused by the assignment of an IP address to more than one computer at the same ______.

    <p>time</p> Signup and view all the answers

    Reduced network administration. DHCP includes the following features to reduce network administration: Centralized and automated TCP/IP configuration. The ability to define TCP/IP configurations from a central location. The ability to assign a full range of additional TCP/IP configuration values by means of DHCP ______. The efficient handling of IP address changes for clients that must be updated frequently, such as those for portable devices that move to different locations on a wireless ______.

    <p>options, network</p> Signup and view all the answers

    What is the purpose of DNS?

    <p>The purpose of DNS is to translate domain names to IP addresses and vice versa.</p> Signup and view all the answers

    What is a URL?

    <p>A URL is the address of a unique resource on the web, such as a webpage or an image.</p> Signup and view all the answers

    What is the role of DNS in Active Directory?

    <p>DNS is responsible for enabling components in Active Directory to find each other and is necessary for Active Directory to function.</p> Signup and view all the answers

    What does the scheme in a URL indicate?

    <p>The scheme in a URL indicates the protocol that the browser must use to request the resource.</p> Signup and view all the answers

    What is the purpose of caching in DNS servers?

    <p>The purpose of caching in DNS servers is to store IP addresses for faster retrieval.</p> Signup and view all the answers

    What is the purpose of DHCP reservations?

    <p>The purpose of DHCP reservations is to ensure that a specific IP address is always assigned to a specific client based on its MAC address.</p> Signup and view all the answers

    True or false: All Active Directory Domains must have a DNS server?

    <p>True. All Active Directory Domains must have a DNS server in order for Active Directory to function properly.</p> Signup and view all the answers

    What are the three parts of a URL and what does each part represent?

    <p>The three parts of a URL are the scheme, authority, and path. The scheme represents the protocol being used (e.g. HTTP or HTTPS), the authority represents the domain and port of the website being requested, and the path represents the location of the resource on the web server.</p> Signup and view all the answers

    What is the purpose of DNS in the recursive name resolution process?

    <p>DNS is used to translate domain names (e.g. <a href="http://www.example.com">www.example.com</a>) into IP addresses. In the recursive name resolution process, DNS servers communicate with each other to find the authoritative nameserver that can provide the IP address of the requested domain.</p> Signup and view all the answers

    What is the role of the TLD nameserver in the DNS recursive lookup process?

    <p>The TLD (Top-Level Domain) nameserver is responsible for a specific subset of domains (e.g. .com, .net). In the DNS recursive lookup process, after consulting the root hint, the DNS server consults the TLD nameserver to obtain information about the domain being requested.</p> Signup and view all the answers

    What is the root hint in DNS and what is its significance?

    <p>The root hint is a list of DNS servers on the Internet that DNS servers can use to resolve queries for names that they do not know. It is represented by a period at the end of a URL. The root hint is significant because it provides the initial information for DNS servers to start the recursive name resolution process.</p> Signup and view all the answers

    What is the difference between an iterative query and a recursive query in DNS?

    <p>An iterative query is a query between DNS servers, where each server provides a referral to the next server until the requested information is found. A recursive query is a query between a DNS client and a DNS server, where the server performs the entire lookup process on behalf of the client.</p> Signup and view all the answers

    How does the DNS server determine the IP address of a requested domain in the recursive name resolution process?

    <p>In the recursive name resolution process, the DNS server starts by querying the root hint to obtain the IP address of the TLD nameserver responsible for the requested domain. It then queries the TLD nameserver to obtain the IP address of the authoritative nameserver for the domain. Finally, it queries the authoritative nameserver to obtain the IP address of the requested domain.</p> Signup and view all the answers

    What is the purpose of an anchor in a URL?

    <p>An anchor in a URL represents a bookmark within a resource. It provides directions to the browser to scroll to the specified location within the resource when the URL is accessed.</p> Signup and view all the answers

    What is the purpose of DNS caching and how does it speed up the DNS resolution process?

    <p>The purpose of DNS caching is to store the answers to DNS queries so that the iterative process of querying multiple DNS servers can be avoided. This speeds up the DNS resolution process by reducing the number of queries required to resolve a domain name to an IP address.</p> Signup and view all the answers

    What are the benefits and drawbacks of using DNS servers for caching?

    <p>The benefits of DNS caching include faster DNS resolution, reduced network traffic, and improved performance. However, there are also drawbacks such as the potential for outdated cache entries, which can lead to incorrect or stale DNS responses. Additionally, caching can consume memory and disk space on DNS servers.</p> Signup and view all the answers

    What are the different types of DNS records and what information do they store?

    <p>The different types of DNS records include Start of Authority (SOA), Name Server (NS), Host (A or AAAA), Mail Exchange (MX), Alias (CNAME), Pointer (PTR), and Service Resource (SRV). These records store information such as domain names, IP addresses, mail server addresses, aliases, and locations of network services critical to Active Directory (AD).</p> Signup and view all the answers

    What is the role of DNS in Active Directory and why is it crucial?

    <p>The role of DNS in Active Directory is to enable the components of Active Directory to find and communicate with each other. It is crucial because Active Directory cannot function properly without a DNS server. DNS is responsible for resolving domain names to IP addresses and vice versa, allowing clients to join the Active Directory domain and access internal resources.</p> Signup and view all the answers

    What are some DNS policies included in Windows Server and how do they enhance DNS resilience?

    <p>Some DNS policies included in Windows Server are load balancing, geo-location based traffic management, split-brain DNS, and time of day-based redirection. These policies enhance DNS resilience by dynamically balancing traffic load between application instances, directing clients to the closest resources based on geographical location, splitting DNS records for internal and external clients, and distributing application traffic across different instances based on time of day.</p> Signup and view all the answers

    What is DHCP and what is its role in assigning IP addresses?

    <p>DHCP stands for Dynamic Host Configuration Protocol. Its role is to automatically assign IP addresses to computers on a network. DHCP is responsible for providing IP addresses, DNS server addresses, subnet masks, and default gateways to clients, eliminating the need for manual IP address configuration and minimizing configuration errors.</p> Signup and view all the answers

    Why is DNS considered a fundamental component of Windows Server Active Directory?

    <p>DNS is considered a fundamental component of Windows Server Active Directory because it is essential for the proper functioning of Active Directory. Without a DNS server, Active Directory cannot be fully functional. DNS is responsible for resolving domain names to IP addresses, allowing clients to join the Active Directory domain, access internal resources, and facilitate communication between Active Directory components.</p> Signup and view all the answers

    What role must be installed as an additional role when setting up a Windows Server Active Directory Domain?

    <p>DHCP Server Role</p> Signup and view all the answers

    What is the purpose of a subnet mask in IP addressing?

    <p>To subdivide the network</p> Signup and view all the answers

    What are the benefits of using a Windows DHCP Server?

    <p>Reliable IP address configuration, reduced network administration, centralized and automated TCP/IP configuration, efficient handling of IP address changes</p> Signup and view all the answers

    What is the purpose of the DHCP DORA process?

    <p>To negotiate a DHCP address between the client and server</p> Signup and view all the answers

    What are DHCP reservations?

    <p>Entries in a DHCP server that assign the same reserved IP address to a client based on its MAC address</p> Signup and view all the answers

    What is the purpose of a default gateway?

    <p>To serve as the next hop router for a host to navigate the network</p> Signup and view all the answers

    What resilience options are built-in to the DHCP Server role?

    <p>Split-Scope DNS and DHCP Failover</p> Signup and view all the answers

    What is the purpose of DNS servers in relation to DHCP?

    <p>To be sent out to clients via DHCP and allow them to access network resources and join the domain</p> Signup and view all the answers

    What is the purpose of parameters in a URL?

    <p>To provide additional information or data to the server</p> Signup and view all the answers

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