5-D Flashcards
What does DHCP stand for?
Dynamic Host Configuration Protocol
What is the purpose of DHCP?
To allocate appropriate IP addresses and subnet masks to hosts that connect to the network
What is a DHCP scope?
The range of addresses that a DHCP server can offer to client hosts in a particular subnet
Fill in the blank: A DHCP scope must exclude any addresses that have been _______.
configured statically
What is a DHCP lease?
The IP address allocated by the DHCP server for a limited period
What process does a DHCP client use to initialize and find a DHCP server?
It broadcasts a DHCPDISCOVER packet
What does a DHCPOFFER packet contain?
The address and other configuration information such as default gateway and DNS server addresses
What happens if a DHCP client cannot renew its lease?
The client must release the IP address and start the discovery process again
What is a DHCP reservation?
A configuration that allows a host to use the same IP address repeatedly
What is the purpose of the DNS?
To resolve host names to IP addresses
What is a fully qualified domain name (FQDN)?
A host name combined with a domain name and suffix, e.g., nut.widget.example
True or False: The root of the DNS hierarchy is represented by a null label.
True
What are the three types of top-level domains (TLDs)?
- Generic (e.g., .com, .org)
- Sponsored (e.g., .gov, .edu)
- Country code (e.g., .uk, .ca)
What is an A record in DNS?
It resolves a host name to an IPv4 address
What is an MX record used for?
To identify an email server for the domain
What does a TXT record in DNS commonly support?
Email verification and spam blocking
Fill in the blank: Sender Policy Framework (SPF) uses a _______ resource record published via DNS.
TXT
What does DomainKeys Identified Mail (DKIM) do?
Uses cryptography to validate the source server for an email message
What is the purpose of the Domain-Based Message Authentication, Reporting, and Conformance (DMARC) framework?
To ensure SPF and DKIM are utilized effectively
What is the function of a virtual LAN (VLAN)?
To divide a local network into multiple broadcast domain segments
What is the default VLAN ID on a managed switch?
1
What is a virtual private network (VPN)?
A secure connection that allows hosts to connect to a LAN over the Internet
What is required for a secure VPN connection?
Special connection protocols and encryption technology
What type of network configuration is used to separate nodes based on traffic type?
VLANs
