Field Tech III - IV Conventional-TCP/IP SERVICES (190E50-3)

How would IP multicasting map address 224.0.0.1 to an Ethernet multicast address?

01:00:5E:00:00:01

Which Dynamic Host Configuration Protocol (DHCP) option code is used for specifying vendor specific options?

128

How long is an Internet protocol version 6 (IPv6) address?

128 bits.

The maximum Domain Name System (DNS) domain name length is how many characters?

255

How many Dynamic Host Configuration Protocol (DHCP) address allocation steps are required to enable the client to successfully acquire a lease from a server?

4

At which point in the lease period does the client first attempt to renew its lease?

50 percent

Which best describes a Dynamic Host Configuration Protocol (DHCP) scope?

A range of addresses from which the server chooses a client address assignment

Which Domain Name System (DNS) record type specifies name to address translation, such as used in a glue record entry?

Address (A).

When can a Dynamic Host Configuration Protocol (DHCP) server reuse an address offered in a DHCPOFFER message?

After the server times out waiting for a DHCPREQUEST message

Which TCP/IP protocol allows a diskless workstation to discover its IP address, as well as download a boot file?

Bootstrap Protocol (BOOTP).

What does Dynamic Host Configuration Protocol (DHCP) Overview and Objectives (DHCP) provide that Bootstrap Protocol (BOOTP) cannot?

DHCP assigns reusable addresses to any requesting host.

Which of the following choices is the correct order in which a Dynamic Host Configuration Protocol (DHCP) client initially obtains an IP address?

DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPACK

How might a Dynamic Host Configuration Protocol (DHCP) client relinquish its current lease?

DHCPRELEASE message.

Which Dynamic Host Configuration Protocol (DHCP) address allocation method assigns reusable addresses to DHCP clients?

Dynamic.

A ping command uses which Internet Control Message Protocol (ICMP) message types? (Choose two.)

Echo Request. Echo Reply.

Which two mechanisms might a host use to resolve fully qualified domain names (FQDN) to IP addresses? (Choose two.)

Hosts table Domain Name System (DNS)

When might a BOOTP client discard a BOOTREPLY message? (Choose three.)

If the destination port number is 67. If the BOOTREPLY targets another media access control (MAC) address. If the BOOTREPLY includes a transaction ID other than its own.

Which IP protocol will a router use to inform neighbor routers of congestion on an interface?

Internet Control Message Protocol (ICMP).

How does network address translation (NAT) help secure a private network from outside attacks?

It allows networks to use private IP addresses on the internal network, and still access the Internet.

Network address translation (NAT) IP address translation assigns external addresses to internal devices in which way?

It assigns the internal address to one of a pool of external addresses.

Which best describes a BOOTP relay agent?

It forwards client BOOTREQUEST messages across subnet boundaries.

Which statement best describes network address translation (NAT) masquerading?

It hides all internal addresses behind one external address.

How does network address and port translation (NAPT) handle an IP packet's source and destination port and IP addresses?

It leaves the destination port and address as is, and changes the source port and address to addresses from its address pool.

How does dynamic address translation enhance network security?

It only maps internal hosts to external addresses for the duration of the connection.

Which of the following describes a Domain Name System (DNS) resolver?

It retrieves IP address information.

How does a network address translation (NAT) netmask work to map internal addresses to external addresses?

It works as an inverse mask, converting the internal network address portion to a public address.

Which Domain Name System (DNS) record lists a zone's name servers?

Name server (NS).

Which network address translation (NAT) address mapping technique maps internal IP addresses to a single, external IP address?

Network address and port translation (NAPT).

For which three purposes might you use multicasting on an IP network? (Choose three.)

Online training Teleconferencing Software distribution

Internet Control Message Protocol (ICMP) supports which TCP/IP utility?

Ping

Which protocol works with Internet protocol version 6 (IPv6) Quality of Service (QoS) mechanisms to provide video and other realtime data with reserved bandwidth across a data flow's path?

Resource Reservation Protocol (RSVP).

Zones maintain domain name information in which record types?

Resource records (RR).

What happens when a dynamic network address translation (NAT) device runs out of addresses to assign?

The NAT device refuses new connections.

Where does the Domain Name System (DNS) namespace begin?

The Root

Why might a device send an Internet Control Message Protocol (ICMP) source quench message?

The device does not have the buffering capacity to forward a datagram.

A Domain Name System (DNS) start of authority (SOA) entry indicates which of the following?

The domain's primary DNS

Why does Internet Control Message Protocol (ICMP) use identifier and sequence numbers?

To allow the sender to match ICMP reply messages with requests.

Why might we use Internet Control Message Protocol (ICMP) testing on an IP network?

To obtain feedback about various problems that might occur on the network.

Why would you use a Bootstrap Protocol (BOOTP) relay agent on your network?

To pass BOOTP messages between subnets

Which three of the following are typical resolver functions? (Choose three.)

Translation of host name to host address (IP address). Translation of host address to host name. General lookup function that returns all of a resource record's (RR) content, rather than a processed form

Which choice is the best solution for allowing externally initiated connections through a network address and port translation (NAPT) network address translation (NAT) device?

Use static address mappings for any internal services we wish to make externally available.

Which two statements concerning multicasting are true? (Choose two.)

User datagram protocol (UDP) uses IP multicast services. IP multicast group membership is dynamic.

In which cases will a BOOTP relay agent discard a BOOTREQUEST message? (Choose three.)

When the destination port is 68. If the OpCode is not 1 or 2. If the Hop count field value exceeds 16.

Which two of the following are examples of relative domain names in the ncti.com domain? (Choose two.)

telnet telnet.ncti