Compare Network Configuration Concepts

Question 1

is the range of addresses that a DHCP server can offer to client hosts in a particular subnet. Do not include static addresses which include DHCP that is on the router of an address.

Answer 1

DHCP scope

Question 2

A host is configured to use DHCP by specifying in its TCP/IP configuration that it should automatically obtain an IP address. an ARP message to check that the address is unused. If so, it will start to use the address and options; if not, it declines the address and requests a new one. The IP address is leased by the server for a limited period only.

Answer 2

DHCP Leases

Question 3

server is configured with a list of the MAC addresses of hosts that should receive the same IP address for printers, servers, routers.

Answer 3

DHCP Reservations

Question 4

A human-readable IP address of a host in the computer network.

Answer 4

Host Name

Question 5

a hostname can be combined with a domain name and suffix. Ex. webserver.example.com
* host name
* domain name
* suffix (TLD)

Answer 5

fully qualified domain name (FQDN).

Question 6

the part of a domain name that comes after the last dot. Ex. .com, .org, .net, .gov

Answer 6

top-level domain (TLD)

Question 7

there are technically 13 root … server addresses (named from A to M), they actually represent hundreds of physical servers spread around the world. It is operated by ICANN

Answer 7

Domain Name System

Question 8

1. 1. You type “example.com” into a web browser.
2. 1. Your computer sends a DNS query to your ISP’s DNS server.
3. 1. Your ISP’s DNS server queries a root DNS server.
4. The root DNS server returns the location of the .com servers.
5. The query reaches the .com TLD servers.
6. The .com TLD servers find the Authoritative DNS server for “example.com”.
7. The Authoritative DNS server returns the IP address for “example.com”.
8. Your ISP’s DNS server sends the IP address to your computer.
9. Your computer uses the IP address to display the website.

Answer 8

DNS query (53)

Question 9

DHCP Lease

Answer 9

is a temporary assignment of an IP address to a device by a DHCP server, where the address is pulled from a pool of available addresses and expires after a set time,

Question 10

DHCP Reservation

Answer 10

a DHCP reservation is a dedicated IP address assigned to a specific device based on its MAC address, ensuring that device always receives the same IP address within the network, regardless of the lease time; essentially, a reservation is a “reserved spot” within the DHCP pool for a particular device

Question 11

record is used to resolve a host name to an IPv4 address

DNS

Answer 11

address (A)

Question 12

resolves a host name to an IPv6 address.

DNS resource record

Answer 12

AAAA record

Question 13

a resource record in the Domain Name System (DNS) that specifies which mail server is responsible for receiving emails for a domain.

DNS record types

Answer 13

Mail Exchange (MX)

Question 14

a type of Domain Name System (DNS) record that stores information about a domain in text format.

Answer 14

TXT record

Question 15

an email authentication protocol that helps verify whether an email was sent from a legitimate source by checking if the sending mail server is authorized to send emails on behalf of a specific domain, preventing email spoofing and phishing attempts by identifying unauthorized senders.

Answer 15

Sender Policy Framework (SPF)

Question 16

a method of email authentication that uses digital signatures to verify the sender of an email.

Answer 16

DomainKeys Identified Mail (DKIM)

Question 17

is an email security standard that prevents spoofing and other email fraud.

Answer 17

Domain-Based Message Authentication, Reporting,
and Conformance

Question 18

a logical network segment created within a physical network, allowing you to group devices together based on their function, regardless of their physical location

Answer 18

Virtual LAN (VLAN)

Question 19

a technology that creates a secure, encrypted connection over the internet, allowing users to transmit data privately and securely, often by masking their IP address and location, essentially creating a “virtual private tunnel” through a public network like the internet.
enables hosts to connect to the LAN without
being physically installed at the site.

Answer 19

virtual private network (VPN)

Question 20

DNS hierarchy

Answer 20

• Root
• top level domain (TLD)
• authoritive

Question 21

a domain name used for customer support access related to an error code, which often occurs in email systems, usually indicating a problem with the recipient email address or server restrictions

Answer 21

515 support domain name