Questions and Answers
What transport layer protocol does DNS normally use?
What does a DNS TTL determine?
How long a DNS entry can be cached.
How many root servers are there?
13
What does an A Record contain?
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Select all that are true: One domain name can point to one IP, or one domain name can point to many IPs, or many domain names can point to the same IP?
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MX stands for ________.
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How many characters can a fully qualified domain name contain?
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What are the four things that all computers need configured in order to operate on a modern network?
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When using Fixed Allocation DHCP, what's used to determine a computer's IP?
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The process by which a client configured to use DHCP attempts to get network configuration information is known as _________________.
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NAT addresses concerns over the dwindling IPv4 address space by ___________________.
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What technique allows for inbound traffic through a NAT?
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The total number of IPv4 addresses is approximately:
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Two-factor authentication is_________________________.
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VPNs are known as a _____ protocol.
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A proxy is something that _______________________.
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Study Notes
Transport Protocols
- DNS primarily uses UDP for queries, although TCP can be utilized in specific scenarios.
DNS Time to Live (TTL)
- TTL, or Time to Live, specifies the duration a DNS entry remains cached before it must be refreshed.
Root Servers
- There are a total of 13 root servers that serve as the backbone of the DNS infrastructure.
A Record
- An A Record in DNS maps a domain name to its corresponding IPv4 address.
Domain Name Flexibility
- A single domain name can point to one or multiple IP addresses.
- Multiple domain names can also resolve to a single IP address.
Mail Exchange (MX)
- MX stands for Mail Exchange, which is essential for routing emails.
Fully Qualified Domain Name (FQDN)
- An FQDN can contain a maximum of 255 characters.
Essential Network Configuration
- Four crucial components for a computer to function on a modern network include:
- A default gateway
- An IP address
- A name server
- A subnet mask
Fixed Allocation DHCP
- In Fixed Allocation DHCP, a computer's IP address is determined using its MAC address.
DHCP Discovery
- The process of a client obtaining network configuration via DHCP is called DHCP Discovery.
Network Address Translation (NAT)
- NAT addresses the issue of limited IPv4 address space by allowing the use of non-routable address space internally.
Port Forwarding
- Port forwarding is the technique that enables inbound traffic through a NAT configuration.
IPv4 Address Total
- Approximate total of IPv4 addresses available is 4.2 billion.
Two-Factor Authentication
- Two-factor authentication enhances security by requiring both a username/password and an additional form of verification.
VPN Protocols
- VPNs are classified as tunneling protocols, facilitating secure data transmission over the internet.
Proxy Functionality
- A proxy acts on behalf of another entity, managing communications between clients and servers.
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Description
This quiz features flashcards that cover key concepts in computer networking, focusing specifically on the transport layer protocols used by DNS, the significance of DNS TTL, and the number of root servers. Perfect for those studying computer networking fundamentals.
