ITNW 1425: Module 25
Which of the following DNS record types is used to resolve IPv6 addresses? A NS AAAA MX
AAAA
Which network service automatically assigns IP addresses to devices on the network? DHCP Telnet DNS traceroute
DHCP
Which of the following best describes DHCP? DHCP automates the process for discovering the MAC address of the destination. DHCP automates the process for discovering the IP address for a domain name. DHCP automates the assignment of IP addresses, subnet masks, gateways, and other IPv4 networking parameters. DHCP automates the translation of private and public IP addresses.
DHCP automates the assignment of IP addresses, subnet masks, gateways, and other IPv4 networking parameters.
What is the correct order for the messages in DHCP operation? DHCPDISCOVER, DHCPOFFER, DHCPNAK, DHCPREQUEST DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPNAK DHCPOFFER, DHCPREQUEST, DHCPDISCOVER, DHCPNAK DHCPREQUEST, DHCPDISCOVER, DHCPOFFER, DHCPNAK
DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPNAK
A host PC has just booted and is attempting to lease an address through DHCP. Which two messages will the client typically broadcast on the network? (Choose two.) DHCPDISCOVER DHCPOFFER DHCPREQUEST DHCPACK DHCPNACK
DHCPDISCOVER, DHCPREQUEST
Refer to the exhibit. Which protocol allows a user to type www.cisco.com instead of an IP address to access the web server? DNS FTP HTML HTTP SNMP
DNS
Which protocol translates a website name such as www.cisco.com into a network address? HTTP FTP DHCP DNS
DNS
Refer to the exhibit. Host A is trying to resolve the name www.internal.cisco.com to an IP address. When the name resolution request is received by a root DNS server, which server will be included in the response for further resolution? DNS server A DNS server B DNS server C web server D
DNS server A
True or false? A DNS server that receives a request for a name resolution that is not within its DNS zone will send a failure message to the requesting client. True False
False
True or false? DHCP clients initiate the DHCP process by sending a DHCPREQUEST message to available DHCP servers. true false
False
Which of the following DNS resource record types resolves authoritative name servers? NS A MX AAAA
NS
Which network server is malfunctioning if a user can ping the IP address of a web server but cannot ping the web server host name? the DNS server the DHCP server the FTP server the HTTP server
The DNS server
A technician is adding a new PC to a LAN. After unpacking the components and making all the connections, the technician starts the PC. After the OS loads, the technician opens a browser, and verifies that the PC can reach the Internet. Why was the PC able to connect to the network with no additional configuration? The PC does not require any additional information to function on the network The PC came preconfigured with IP addressing information from the factory. The PC was preconfigured to use DHCP. The PC used DNS to automatically receive IP addressing information from a server. The PC virtual interface is compatible with any network.
The PC was preconfigured to use DHCP.
Which of the following is displayed by the nslookup utility? the configured default DNS server the IP address of the end device all cached DNS entries
The configured default DNS server
What type of information is contained in a DNS MX record? the FQDN of the alias used to identify a service the IP address for an FQDN entry the domain name mapped to mail exchange servers the IP address of an authoritative name server
The domain name mapped to mail exchange servers
What action does a DNS server take if it does not have an entry for a requested URL? The server drops the request. The server returns a "page not found" response to the client. The server checks with another DNS server to see if it has an entry. The server assigns a temporary IP address to the name and sends this IP address to the client.
The server checks with another DNS server to see if it has an entry.
Which statement is true about DHCP operation? If the client receives several DHCPOFFER messages from different servers, it sends a unicast DHCPREQUEST message to the server from which it chooses to obtain the IP information. A client must wait for lease expiration before it sends another DHCPREQUEST message. When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network. The DHCPDISCOVER message contains the IP address and subnet mask to be assigned, the IP address of the DNS server, and the IP address of the default gateway.
When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server? unicast DHCPACK broadcast DHCPACK unicast DHCPREQUEST broadcast DHCPREQUEST
broadcast DHCPREQUEST
