Layers
UDP is particularly suitable for which type of applications?
Applications that require extensive error checking and correction
Applications that send large amounts of data in each packet
Applications that send small amounts of data and do not require acknowledgment
Applications that require guaranteed delivery
Applications that send small amounts of data and do not require acknowledgment
What is the difference between stateless and stateful modes in DHCPv6?
Stateful mode provides a routable IP address and additional options, while stateless mode only provides additional options.
Stateful mode is used exclusively for IPv4 networks, while stateless mode is used for IPv6 networks.
Stateless mode uses multicast for discovery, while stateful mode uses broadcast.
Stateless mode provides a routable IP address, while stateful mode does not.
Stateful mode provides a routable IP address and additional options,
while stateless mode only provides additional options
What happens to a Windows host configured for dynamic addressing if it fails to obtain a lease?
It uses a static IP address from the network configuration.
It selects an address in the 169.254.0.0/16 range.
It disconnects from the network.
It uses the last successful IP address lease
It selects an address in the 169.254.0.0/16 range.
One of your employees, working from home, reports that they can no longer access her email via the Outlook client, which keeps displaying a "server not found" error.
However, the employee can access their email through the web interface without any issues.
What should the employee check first to troubleshoot the issue on their computer?
The DNS cache on her computer
The physical connection of her home router
The Outlook client's account settings
The VPN connection to her company's network
The DNS cache on her computer
What is the significance of the priority value in MX records?
Determines the encryption level
Specifies the preferred server in a list of servers
Identifies the email server's IP address
Stores free-form text
Specifies the preferred server in a list of servers
You are analyzing a TCP session teardown in a network capture. You notice that after a period of data transfer, the client sends a FIN packet to the server.
The server responds with an ACK packet and, after a short delay, sends a FIN packet to the client. The client then sends an ACK packet to the server.
What is the final state of the client after this exchange?
ESTABLISHED
LAST-ACK
TIME-WAIT
CLOSE-WAIT
TIME-WAIT
Which types of traffic can the IP helper function be configured to forward?
Only encrypted traffic
DHCP and Network Time Protocol (NTP) traffic
Only DHCP traffic
Only DNS queries
DHCP and Network Time Protocol (NTP) traffic
Which protocol performs functions in IPv6 similar to ARP and ICMP in IPv4?
TCP
Neighbor Discovery (ND) Protocol
DHCPv6
SLAAC
Neighbor Discovery (ND) Protocol
Why should internal DNS zones not be accessible from the Internet?
To facilitate DNS forwarding
To ensure DNS servers can perform recursive queries
To allow external clients to access internal resources
To prevent DNS spoofing attacks from external sources
To prevent DNS spoofing attacks from external sources
What is the role of the Key Signing Key (KSK) in DNSSEC?
To sign the package of resource records directly
To encrypt DNS traffic
To sign the Zone Signing Key
To validate DNS client requests
To sign the Zone Signing Key
What is the general application of UDP forwarding in the context of IP helper functionality?
To forward specific types of broadcast traffic
To block all UDP traffic
To forward only DHCP requests
To encrypt UDP traffic for security purposes
To forward specific types of broadcast traffic
Which of the following would a device use to receive NTP configuration from a NTP server that's located on a different network?
Static Routing
VLAN Tagging
ARP Broadcasting
IP Helper
IP Helper
On which port does the DHCP server listen for client requests?
67
68
69
66
67
What should be checked if a single client cannot resolve names?
The physical network connection of the server
The DHCP server configuration
The client's DNS server configuration
The subnet mask of the client
The client's DNS server configuration
A network administrator suspects that an unauthorized web server is running on one of the company's internal machines. The administrator wants to quickly check for any services listening on common web server ports across the network.
Which netstat command should the network administrator use to identify listening ports?
netstat -a
netstat -o
netstat -n
netstat -s
netstat -a
You're an application developer, and you're writing a program for exchanging video files through a TCP/IP network. You need to select a transport protocol that will guarantee delivery.
Which TCP/IP protocol provides this capability?
UDP
TCP
SIP
FTP
TCP
What must be allocated to a DHCP server to ensure proper functionality?
A dynamic IP address
A subnet mask only
A static IP address
A DHCP client ID
A static IP address
What is the general application of UDP forwarding in the context of IP helper functionality?
To forward specific types of broadcast traffic
To block all UDP traffic
To forward only DHCP requests
To encrypt UDP traffic for security purposes
To forward specific types of broadcast traffic
Which type of top-level domain is typically managed by an organization appointed by the relevant government?
Country Code
Second-Level
Generic
Sponsored
Country Code
What is the purpose of Router Solicitations (RS) in IPv6?
To resolve MAC addresses
To encrypt traffic between hosts and routers
To request Router Advertisements from routers
To assign static IP addresses
To request Router Advertisements from routers
Which of the following is true about the assignment of port numbers to server applications by the Internet Assigned Numbers Authority (IANA)?
All port numbers are assigned dynamically by IANA.
Port numbers 0 through 1,023 are documented at iana.org for "wellknown" server applications.
Port numbers 1,024 through 49,151 are preassigned to "well-known"
server applications.
IANA assigns port numbers above 65,535 for special applications.
Port numbers 0 through 1,023 are documented at iana.org for "wellknown" server applications.
Why must a DHCP server be placed in the same subnet as its clients?
To ensure it can assign IP addresses to them
To increase the server's processing speed
To comply with network security policies
To reduce network latency
To ensure it can assign IP addresses to them
What is the significance of a link-local address in IPv6?
It is only necessary for devices acting as routers.
It must always be configured on an interface.
It is an optional configuration for improved network security.
It is used for routing packets over the Internet.
It must always be configured on an interface.
You are configuring a new web server for your company, which will host the company's mainwebsite. The server has an IPv4 address of 192.168.1.5. You want the website to be accessible through both www.company.com and company.com.
Which of the following DNS record configurations would BEST achieve this goal?
Create an AAAA record for company.com and a CNAME record for www.company.com aliasing company.com.
Create two A records, one for www.company.com and one for company.com, both pointing to 192.168.1.5.
Create an A record for company.com pointing to 192.168.1.5 and a CNAME record for www.company.com aliasing company.com.
Create a CNAME record for company.com aliasing www.company.com and an A record for www.company.com pointing to 192.168.1.5.
Create an A record for company.com pointing to 192.168.1.5 and a CNAME record for www.company.com aliasing company.com.
You are a network administrator troubleshooting a name resolution issue within your company's internal network. You suspect that the DNS server might not be resolving internal hostnames correctly.
Which nslookup command should you use to query the DNS server for the hostname binternal-server.company.local?
nslookup internal-server.company.local
nslookup -debug internal-server.company.local
nslookup -type=a internal-server.company.local
nslookup -type=mx internal-server.company.local
nslookup internal-server.company.local