ECSA 102 PRINTING CERTIFICATION
EVALUATION EXAMS COMPLETE
QUESTIONS AND ANSWERS PRACTICE
SOLUTION
⩥ DMARC?
Answer: Domain based message authentication reporting and
conformance, an extension of SPF and DKIM, where you decide what to
do with mail that doesn't verify
⩥ What is the scope of DHCP?
Answer: The pool of IP addresses to choose from, with each subnet
having its own scope
⩥ What is the D of DHCP mean?
Answer: Dynamic = IP is chosen from the pool with a lease, and the
DHCP will give a past assignment if applicable
⩥ What is a lease?
Answer: IP lease, meaning the device only has the assigned IP address
for a certain amount of time before it has to check back in with the
DHCP
,⩥ How does a reservation work?
Answer: Device will always get the same IP and the IP isn't ever
dynamically assigned, based on device MAC address
⩥ What are the DHCP renewal stages?
Answer: T1 timer = after 50% of lease time, device will check with
DHCP for full time RENEWAL
T2 timer = DHCP was down for T1, 87.5% of the lease time will check
in for REBINDING with DHCPq
⩥ What is a VPN?
Answer: Virtual private network for encrypting data while traversing a
public network
⩥ What is a concentrator?
Answer: Encrypts and decrypts data for a VPN, often found in the
firewall
⩥ What is satellite networking?
Answer: Non-terrestrial communication, often expensive
⩥ What are statistics for satellite networking?
Answer: 50Mbits download, 3Mbits upload, 250ms latency, 2GHz
,⩥ What is rain fade?
Answer: When the satellite loses its line of sight when raining
⩥ What are characteristics of optical fiber?
Answer: Uses frequencies of light, high speed long distance, expensive
compared to copper, secure/interference resistant because cannot be
tapped with RF
⩥ Speed of DOCSIS?
Answer: 50Mbits - 1000Mbits
⩥ What is tethering?
Answer: Connecting to a phone via a cable to use the cellular network
for access
⩥ What is WISP?
Answer: Wireless internet service provider, for rural locations, with an
outdoor antenna
⩥ How is a WAN connecred?
Answer: Point to point serial connections, MPLS, terrestrial and non-
terrestrial communication
, ⩥ What does MPLS mean?
Answer: Multiprotocol label switching, connecting a WAN by using
other connections along the way, providing a path
⩥ MAN?
Answer: Metropolitan area network, larger than a LAN smaller than a
WAN
⩥ SAN?
Answer: Storage area network
⩥ What are cable crimpers?
Answer: Pinches connector on cables, like for RJ45
⩥ What is a WiFi analyzer?
Answer: Used to understand frequencies on the network, which
frequencies are used and open, used to find best antenna locations and if
there is interference
⩥ What is a tone generator/probe?
Answer: Used to find which cable you want, generator attached to one
end then probe to find the sound
EVALUATION EXAMS COMPLETE
QUESTIONS AND ANSWERS PRACTICE
SOLUTION
⩥ DMARC?
Answer: Domain based message authentication reporting and
conformance, an extension of SPF and DKIM, where you decide what to
do with mail that doesn't verify
⩥ What is the scope of DHCP?
Answer: The pool of IP addresses to choose from, with each subnet
having its own scope
⩥ What is the D of DHCP mean?
Answer: Dynamic = IP is chosen from the pool with a lease, and the
DHCP will give a past assignment if applicable
⩥ What is a lease?
Answer: IP lease, meaning the device only has the assigned IP address
for a certain amount of time before it has to check back in with the
DHCP
,⩥ How does a reservation work?
Answer: Device will always get the same IP and the IP isn't ever
dynamically assigned, based on device MAC address
⩥ What are the DHCP renewal stages?
Answer: T1 timer = after 50% of lease time, device will check with
DHCP for full time RENEWAL
T2 timer = DHCP was down for T1, 87.5% of the lease time will check
in for REBINDING with DHCPq
⩥ What is a VPN?
Answer: Virtual private network for encrypting data while traversing a
public network
⩥ What is a concentrator?
Answer: Encrypts and decrypts data for a VPN, often found in the
firewall
⩥ What is satellite networking?
Answer: Non-terrestrial communication, often expensive
⩥ What are statistics for satellite networking?
Answer: 50Mbits download, 3Mbits upload, 250ms latency, 2GHz
,⩥ What is rain fade?
Answer: When the satellite loses its line of sight when raining
⩥ What are characteristics of optical fiber?
Answer: Uses frequencies of light, high speed long distance, expensive
compared to copper, secure/interference resistant because cannot be
tapped with RF
⩥ Speed of DOCSIS?
Answer: 50Mbits - 1000Mbits
⩥ What is tethering?
Answer: Connecting to a phone via a cable to use the cellular network
for access
⩥ What is WISP?
Answer: Wireless internet service provider, for rural locations, with an
outdoor antenna
⩥ How is a WAN connecred?
Answer: Point to point serial connections, MPLS, terrestrial and non-
terrestrial communication
, ⩥ What does MPLS mean?
Answer: Multiprotocol label switching, connecting a WAN by using
other connections along the way, providing a path
⩥ MAN?
Answer: Metropolitan area network, larger than a LAN smaller than a
WAN
⩥ SAN?
Answer: Storage area network
⩥ What are cable crimpers?
Answer: Pinches connector on cables, like for RJ45
⩥ What is a WiFi analyzer?
Answer: Used to understand frequencies on the network, which
frequencies are used and open, used to find best antenna locations and if
there is interference
⩥ What is a tone generator/probe?
Answer: Used to find which cable you want, generator attached to one
end then probe to find the sound
