A Windows computer on your network is having issues resolving queries for a specific domain, but not other domains. Other computers on the same network resolve the name just fine. What command can you issue that might fix the problem?
answer
ipconfig /flushdns
question
At the Transport layer of the OSI, what is used to find and communicate with a particular application running on a host?
answer
port numbers
question
Encrypted control of remote computers using the RDP protocol is accomplished using what port number?
answer
TCP 3389
question
How do routers create a broadcast domain boundary?
answer
They do not forward broadcast traffic.
question
What command can you utilize to display TCP/IP configuration information for each network adapter installed?
answer
ipconfig/all
question
If a host's IPv6 address contains the network adapter's MAC address within the last 64 bits of the IPv6 address, what standard is being used?
answer
EUI-64
question
What does the MX record do in a forward DNS zone?
answer
It identifies the e-mail server to be used for e-mail traffic for the domain.
question
What is by far the most popular DNS server software available?
answer
BIND
question
What is the ARPA domain suffix utilized for?
answer
It is used for reverse DNS queries, and holds PTR records.
question
What statement regarding the Server Message Block protocol is accurate?
answer
It is used by Windows and UNIX-based operating systems to share files.
question
What text editor can be used on Linux to view and edit the contents of a configuration file?
answer
vim
question
What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and communicating with the network?
answer
ping
question
Which of the following IP addresses would be a loopback IP address?
answer
127.0.0.1
question
Which of the following IPv6 addresses represents a global unicast address?
answer
2000::/3
question
Which of the following is NOT a range of IP addresses recommended for use in private networks?
answer
127.0.0.0 through 127.255.255.255
question
With a FQDN of ftp1.dallas.mycompany.com, what part is the domain name?
answer
mycompany.com
question
You are troubleshooting a DNS issue on a Linux system, and need to test the resolution of your domain mycompany.com MX record using Google's DNS server with the IP address of 8.8.8.8. What dig command will accomplish this?
answer
dig @8.8.8.8 mycompany.com MX
question
You are setting up a DNS zone and have been asked to create SPF and DKIM records. What type of DNS record will hold this information?
answer
TXT record
question
You are troubleshooting a network issue on a client computer and discover that the network card has an IP address of 169.254.196.200. What does this mean?
answer
The computer is configured to use DHCP, but was unable to lease an address.
question
Your supervisor has asked you to configure a new prototype network with a dual stack configuration. What does this mean?
answer
Both IPv4 and IPv6 protocols will be used on the network.
question
How can you determine the manufacturer of a NIC card based on the MAC address?
answer
The first 24 bits, known as the Organizationally Unique Identifier, identify the manufacturer.
question
On a Linux-based system, what command can be used to display TCP/IP information associated with every interface on the system?
answer
ifconfig -a
question
In the DNS hierarchy, where is information about how to find the top-level domain servers held?
answer
On the DNS root servers.
question
In the classful addressing scheme, what range of network addresses is considered a Class B?
answer
128.0.x.y to 191.255.x.y
question
In a DNS zone, what type of record holds the name-to-address mapping for IPv6 addresses?
answer
AAAA record
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