Ch02 Point Quiz

a way of reducing the number of individual routing table entries that routers must manage

route aggregation

Multicast addresses in IPv6 use which of the following to define the portion of the Internet to which the multicast group pertains?

scope identifier

a 4-bit field limiting the valid range for a multicast address

scope identifier

The activity of stealing (borrowing) bits from the host portion to further subdivide the network portion of an address is called ____________________.

subnetting

As a frame moves from interface to interface, the IP source and destination address information is preserved.

true

IP addresses can be represented as domain names to make it possible for users to identify and access resources on a network.

true

To be valid, any domain name must correspond to at least one of which of the following?

unique numeric ip address

In IPv6, which address contains all zeros and can be represented as two colon characters (::) in normal notation?

unspecified

In which subnetting technique can a single address to be subdivided into multiple subnets, in which subnets need not all be the same size?

variable-length subnet masking

Which RFC reserves three ranges of IP addresses for private use - a single Class A (10.0.0.0-10.255.255.255), 16 Class Bs (172.16.0.0-172.31.255.255), and 256 Class Cs (192.168.0.0-192.168.255.255)?

1918

Providing a narrower address space is the primary design goal for IPv6.

False

What technique may be performed by boundary devices that include proxy server capabilities to replace private IP addresses with one or more public IP addresses as outbound traffic exits the server, and to replace such public addresses with their proper private equivalents as incoming traffic passes through the server?

Address masquerading

Which class of IP addresses are used for multicast communications, in which a single address may be associated with more than one network host machine?

Class D

What technology gets its name from the notion that it ignores the traditional A, B, and C class designations for IP addresses?

Classless Inter-Domain Routing

Which of the following allows IPv4 addresses from Class A, B, or C to be combined and treated as a larger address space, or subdivided arbitrarily, as needed?

Classless Inter-Domain Routing

Which technique is known as the simplest form of subnet masking in which each subnet includes the same number of stations and represents a simple division of the address space made available by subnetting into multiple equal segments?

Constant length subnet masking

Previously, IPv6 specified that interface identifiers followed which format, which specifies a unique 64-bit interface identifier for each interface?

EUI-64

Class D addresses are used strictly for unicast applications.

False

What name is given to a device that interconnects multiple IP networks or subnets?

IP gateway

When a computer on one subnet wishes to communicate with a computer on another subnet, traffic must be forwarded from the sender to which of the following devices?

IP gateway

The physical numeric address functions at a sublayer of the Data Link layer in the OSI network reference model, called the ____________________.

MAC layer

Which technology allows networks use multiple private IPv4 addresses internally and maps them to one or more public IPv4 addresses externally?

Nat

Which of the following can be used to replace internal network addresses with one or more different addresses so the traffic that actually travels over the public Internet does not reveal the address structure of the internal network to outsiders?

Proxy Server

What protocol is used to translate MAC layer addresses into numeric IP addresses?

RARP

____________________ informs the network interface card to pass packets sent to that address to the IP stack so their contents can be read, and tells the IP gateway to forward such traffic onto the physical network, where the listening network interface resides.

Registration

____________________ combines contiguous network addresses by stealing bits from the network portion and using them to create a single, larger contiguous address space for host addresses.

Supernets

When a host uses a service that employs a multicast address, it registers itself to "listen" on that address, as well as on its own unique host address (and the broadcast address).

True

an address that can be combined with other addresses into a single entry in the router table

aggregatable global unicast address

packets goes to the nearest single instance of this address

anycast address

allows internetwork devices to perform complex address recognition and management functions that can keep up with data volumes and time-sensitive processing needs

application specific intergrated circuts

Which of the following technologies is used to permit computers to translate numeric IP addresses to MAC layer addresses?

arp

A special bit pattern that "blocks off " the network portion of an IPv4 address with an all-ones pattern is known as which of the following?

broadcast address

Which of the following represents a network address that all hosts on a network must read?

broadcast address

Which term is used to describe the data frame crossing a router?

hop

in IPv6 addressing, a bit string that uniquely identifies a particular interface

interface identifier

a type of networking device that combines switch, router, and network management functions within a single box

layer 3 switch

an addressing scheme that is designed to be used only on a single segment of a local network

link-local address

an IPv6 address that is all zeros except for the very last bit, which is set to 1 and may be represented as ::1 in compact notation

loopback address

In IPv6, _________________________ addresses are used to send an identical message to multiple hosts.

multicast address

What type of address is a six-byte numeric address, burned into firmware (on a chip) by network interface manufacturers?

physical numberic