Exam study Net II

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). T or F

True

if two network interfaces are on the same physical network, they can communicate directly with one another at the MAC layer. T or F

True

multicast addresses come in handy when a class of devices, such as routers, must be updated with the same information on a regular basis. T or F

True

the time it takes to route from one network to another is affected by the size of the routing table. T or F

True

when two or more RFCs cover the same topic, they usually also share the same title. T or F

True

A Best current practice(BCP) RFC is a special form of standard RFC. T or F

False

CIDR addresses are commonly applied to class A addresses. T or F

False

Most logical addresses are pre-set in network interface cards at the factory. T or F

False

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

False

RFC 5000 describes how an RFC is created and what processes it must go through to become and official standard, adopted by the IETF. T or F

False

The Session layer is equipped to request retransmission of all erroneous or missing PDUs when reassembly is underway, so that it can guarantee reliable delivery of data from sender to receiver. T or F

False

class D addresses always take the following binary form: bbbbbbbb.11111111.111111111.11111111111. T or F

False

List the seven layers of the ISO/OSI network reference model in ascending order, starting with Layer 1.

1- Physical 2- data link 3- Network 4- Transport 5- Session 6- presentation 7- Application

the decimal equivalent of binary 1000000 is

128

Formerly, addresses were under the auspices of ___. (IANA)

Internet Assigned Numbers Authority (IANA)

The ___________________ is the parent organization for all the various internet boards and task forces.

Internet Society

The term ________________ refers to a single logical network composed of multiple physical networks, which may all be at a single physical location, or spread among multiple physical locations.

Internetwork

The OSI Model's ___________________ layer includes the physical transmission medium (cables or wireless media) that any network must use to send and receive the signals that constitute the physical expression of networked communications.

Physical

Each TCP/IP service has an associated ___ that uses a 16-bit number to identify a specific process or service.

Port address

_____________ proxying permits the proxy server to front for servers inside the boundary by advertising only the proxy server's address to the outside world, and then forwarding only legitimate requests for service to internal servers for further processing.

Reverse

A card that runs in promiscuous mode can capture broadcast packets. T or F

True

A divide and conquer approach permits concerns related to networking hardware to be completely separated from those related to networking software. T or F

True

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

True

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

True

On any system, only those protocol numbers for protocols that are actually in use must be defined on that system. T or F

True

Originally, when IP addresses were assigned for public use, they were assigned on a per-network basis. T or F

True

PDUs typically include "envelope information" in the form of specific headers and trailers. T or F

True

The class A network address of 12.0.0.0 is written as 12.0.0/8 in prefix notation. T or F

True

what is the decimal value of 11110000 (a four-bit subnet mask)? a. 240 b. 248 c. 192 d. None of these choices e. 224

a. 240

E-mail and FTP services works at which layer of the OSI model? a. Application b. Transport c. Session d. Presentation e. Host-to-Host f. Network interface

a. Application

The 7 layers of the OSI model are out or order. choose the correct answer to place them in order from the highest to the lowest layer. a. Application, presentation, session, Transport, Network, Data Link, Physical b. Physical, MAC, LLC, Network, Transportation, Session, Application c. Application, Physical, session, Network, Transport, Data Link, Presentation d. Application, Session, Presentation, Transport, Data Link, Physical e. Application, Session, Presentation, Data Link, Host-to-Host, Data link, Physical f. physical, Data Link, Internet, Host-to-Host, Session, Presentation, Application

a. Application, presentation, session, Transport, Network, Data Link, Physical

Many analyzers have configurable ____ that indicate unusual network events or errors. a. sessions b. ports c. anomalies d. sockets e. alarms

e. alarms

which of the following steps must a standard RFC go through to become an official standard? (choose all that apply). a. Draft Standard b. Retired Standard c. Proposed Standard d. Standard (sometimes called "Internet Standard") e. Historic Standard

a. Draft Standard c. Proposed Standard d. Standard (sometimes called "Internet Standard"

which of the following devices works at the APPlication layer of the OSI model? a. Gateway b. Bridge c. Repeater d. Brouter e. Hub f. Modem

a. Gateway

you want to connect two Ethernet networks with different protocols. what device (found in the Application layer) can you use to do this? a. Gateway b. Router c. Repeater d. Bridge e. Switch f. Multiport Repeater

a. Gateway

What are the sublayers of the data link layer? a. MAC and LLC b. MAC and IPX c. hardware and frame d. WAN and LAN e. TFTP and telnet

a. MAC and LLC

which of these network devices belongs at the OSI physical layer (layer one)? a. Repeater b. router c. switch d. bridge e. None of theses choices

a. Repeater

which of the following TCP/IP protocols operate at the TCP/IP Transport layer? (choose all that apply) a. TCP b. ICMP c. ARP d. UDP e. PPP

a. TCP d. UDP

which of the following are transport layer protocols? a. TCP and UDP b. IP c. FTAM d. IP and TFTP e. TFTP

a. TCP and UDP

which of the following milestone events for TCP/IP occurred in 1983? (choose all that apply) a. TCP/IP appears in the 4.2BSD UNIX distribution b. initial development of name server technology occurs c. NSF launches the NSFNET d. The department of Defense mandates TCP/IP as the "official ARPANET protocol."

a. TCP/IP appears in the 4.2BSD UNIX distribution b. initial development of name server technology occurs d. The department of Defense mandates TCP/IP as the "official ARPANET protocol."

which OSI layer is responsible for reliable, sequenced, and error free delivery? a. Transport b. Session c. Network d. Physical e. Data link f. Presention

a. Transport

_________ assign a series of numbers to represent a sizable collection of TCP/IP-based network services, such as file transfer (FTP), terminal emulation (Telnet), and e-mail. a. Well-known protocols b. Datagrams c. Data frames and Datagrams d. Daemons e. Data frames

a. Well-known protocols

which of the following are considered to be the upper layer protocols? a. application, presentation, and session b. presentation and session c. application and presentation d. application, presentation, session, and transport e. application

a. application, presentation, and session

The layers of the OSI model, from the top down, are: a. application, presentation, session, transport, network, data link, physical b. session, presentation, data transport, MAC network, physical c. physical, data link, network, transport, session, presentation, application d. application, encryption, network, transport, logical link control, physical

a. application, presentation, session, transport, network, data link, physical

which of the following components operate at the physical layer? (choose all that apply) a. cables b. segmentation and reassembly c. network interface cards (NICs) d. connectors

a. cables c. network interface cards (NICs) d. connectors

A packet filter that's applied to incoming data in a protocol analyzer may be called a ________ (choose all that apply) a. capture filter b. post-filter c. egress filter d. data filter e. pre-filter

a. capture filter e. pre-filter

Bridges operate at which layer of the OSI model? a. data link b. physical c. transport d. network e. session

a. data link

what layer of the OSI model associated with the MAC and LLC sublayers? a. data link b. physical c. network d. transport e. None of these choices

a. data link

which terms represent parts of a PDU that are always present in any PDU? (choose all that apply) a. header b. checksum c. payload d. trailer

a. header c. payload

which of the following represents an improvement of IPv6 over IPv4? (choose all that apply) a. larger address space b. better security c. improved broadcast support d. better support for mobile IP

a. larger address space b. better security d. better support for mobile IP

what is OSI model stand for? a. open systems interconnection b. open sysops interconnection c. open systems interface d. open session interface e. open says Ipswich f. open standards interconnection

a. open systems interconnection

which of the following features are typical for most protocol analyzers? (choose all that apply) a. packet filters may be applied to incoming data before capture, or to store data after capture b. Alarms may be set to flag unusual network events or conditions. c. packet filters display various statistical reports and graphs based on traffic analysis d. decodes may be applied to packets in the trace buffer. e. packet filters include built-in trend analysis and capacity-planning tools

a. packet filters may be applied to incoming data before capture, or to store data after capture b. Alarms may be set to flag unusual network events or conditions. c. packet filters display various statistical reports and graphs based on traffic analysis d. decodes may be applied to packets in the trace buffer.

Bit Synchronization is handled at which layer? a. physical b. data link c. session d. transport e. presentation

a. physical

Repeaters and hubs operate at which layer? a. physical b. network c. data link d. transport e. session

a. physical

The___ includes the physical transmission medium (cables or wireless media) that any network must use to send and receive the signals that constitute the physical expression of networked communications. a. physical layer b. Data link layer and Network layer c. Data link layer d. Transport layer e. Network layer

a. physical layer

which of the following items represent design goals that motivated the development of TCP/IP? (choose all that apply) a. support for long-haul connections b. ability of dissimilar systems to exchange data c. robust network architecture d. high performance e. reliable delivery mechanisms

a. support for long-haul connections b. ability of dissimilar systems to exchange data c. robust network architecture e. reliable delivery mechanisms

Which of the following statements represent benefits of a layered approach to networking? (choose all that apply) a. takes a big problem and breaks it into a series of smaller interrelated problems b. allows individual layers to be insulated from one another c. permits expertise to be applied from different disciplines for different layers d. permits hardware issues to be kept separate from software issues

a. takes a big problem and breaks it into a series of smaller interrelated problems b. allows individual layers to be insulated from one another c. permits expertise to be applied from different disciplines for different layers d. permits hardware issues to be kept separate from software issues

which of the following activities may occur during the protocol analysis process? (choose all that apply) a. tapping into network communications b. decoding packets into readable form c. gathering statistics d. retransmitting captured packets for testing e. capturing packets "off the wire"

a. tapping into network communications b. decoding packets into readable form c. gathering statistics e. capturing packets "off the wire"

what layer of the OSI model is designed to perform error recovery functions? a. transport b. data link c. physical d. network e. None of these choices

a. transport

A_____represents a network address that all hosts on a network must read. a. dot quad b. loopback c. hop d. multicast e. broadcast address

e. broadcast address

For an IPv6 multicast address, how many bits are assigned to the group ID? a. 32 b. 112 c. 64 d. 96 e. 48

b. 112

The loopback address for a network interface lets the computer user test the interface. what is the loopback address using IPv6? a. ::1:: b. ::1 c. :1: d. 1 e. None of these

b. ::1

______is used to translate Mac layer addresses into numeric IP addresses. a. ARP and RARP b. RARP c. ARP d. Reverse proxying e. subnet masking

b. RARP

which of the following TCP/IP network model layer(s) maps most nearly to single layers in the ISO/OSI network reference model? (choose all that apply) a. TCP/IP Application layer b. TCP/IP Transport layer c. TCP/IP Network Access layer d. TCP/IP Internet layer

b. TCP/IP Transport layer

which kinds of devices absolutely require public IP addresses? (choose all that apply) a. every server on an internet network b. any server whose services should be available to the internet c. any device attached directly to the internet d. every client on an internal network

b. any server whose services should be available to the internet c. any device attached directly to the internet

what function(s) does the session layer provide? (choose all that apply) a. segmentation and reassembly b. checkpoint controls c. session setup, maintenance, and tear-down d. data format conversions

b. checkpoint controls c. session setup, maintenance, and tear-down

which of the following types of IP addresses includes the most network addresses? a. class E b. class C c. class A d. class D e. class B

b. class C

which of the following tools or techniques helped to alleviate IPv4 address scarcity? (choose all that apply) a. IPv6 b. increased use of private IP addresses c. NAT d. CIDR

b. increased use of private IP addresses c. NAT d. CIDR

which of the following are benefits of using a layered network model? A. it specifies how changes to one layer must be propagated through the other layers. b. it facilitates troubleshooting c. it focuses on details rather than general functions of networking d. it breaks the complex process of networking into more manageable chunks e. it allows layers developed by different vendors to interoperate

b. it facilitates troubleshooting d. it breaks the complex process of networking into more manageable chunks e. it allows layers developed by different vendors to interoperate

which of the following address types are supported by IPv6? (choose all that apply.) a. broadcast b. multicast c. unicast d. anycast

b. multicast c. unicast d. anycast

The TCP/IP Application layer also is known as the _____ layer because this is where the protocol stack interfaces with applications or processes on a host machine. a. Network b. process c. session d. Transport e. None of these choices

b. process

which of the following services perform address hiding? (choose all that apply) a. VLSM b. proxy c. NAT d. IPv6

b. proxy c. NAT

Multicast addresses in IPv6 use a(n) ______ to define the portion of the internet to which the multicast group pertains. a. aggregatable global unicast address b. scope identifier c. loopback identifier d. interface identifier e. IPv6 does not emply multicast

b. scope identifier

A(n)_____________is holding area for packets copied off the network. a. layer b. trace buffer c. payload d. cache e. packet

b. trace buffer

The internet protocol (IP) generally corresponds to which OSI layer? a. Network (layer three) b. transport (layer four) c. data link (layer two) d. session (layer five) e. None of theses choices

b. transport (layer four)

An IPv6 unicast address is made up of which of the following? a. All of these choices b. a 64-bit interface ID, a 32-bit network portion, and a 32-bit broadcast address c. a 64-bit interface ID and a 64-bit network portion d. a 96-bit interface ID and a 32-bit network portion e. a 32-bit interface ID and a 96-bit network portion

c. a 64-bit interface ID and a 64-bit network portion

The process of combining multiple outgoing protocol streams at the Transport and Network layers in TCP/IP is called_______ a. routing b. All of these choices c. multiplexing d. demultiplexing e. forwarding

c. multiplexing

The session layer includes mechanisms to maintain reliable ongoing conversations called______________

checkpoints

The simplest form of subnet masking uses a technique called _____________, 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

The ________ address is a six-byte numeric address, burned into firmware (on a chip) by network interface manufacturers. a. logical numeric b. static c. reverse proxy d. symbolic e. physical numeric

e. physical numeric

The broadcast address for the class B network 172.16.0.0 is___ a. None of these choices b. 172.16.0.1 c. 172.16.0.255 d. 172.16.255.255 e. 172.16.255.0

d. 172.16.255.255

which of the following subnet masks is the default for a class B IP address? a. 255.255.255.255 b. VLSM eliminates class B addressing c. 255.255.255.0 d. 255.255.0.0 e. 255.0.0.0

d. 255.255.0.0

The ___ is where notions of network location are addressed and where the intricacies involved in directing a PDU from sender to receiver are handled. a. Data link layer b. Application layer c. Transport layer d. Network layer e. Data link layer and Network layer

d. Network layer

The ______manages the way data is presented to the network (on its way down the protocol stack), and to a specific machine/application combination (on its way up the protocol stack) a. Transport layer b. Network layer c. Session layer d. Presentation layer e. Physical layer

d. Presentation layer

IPv6 requires each device on the network to have its own unique address or identifier with one exception: a. There are no exceptions b. Network devices in a multicast group all use a single, unique identifier for their interfaces c. multicast devices on a local network may share the same anycast idencifier. d. a host with multiple interfaces providing dynamic load balancing can use a single identifier for all interfaces e. mobile devices may use multiple identifiers because they frequently move from one network zone to the next.

d. a host with multiple interfaces providing dynamic load balancing can use a single identifier for all interfaces

The upper layers of the OSI model are (in numeric order): a. session, presentation, application b. session, application, presentation c. session, application, presentation, physical d. application, presentation, session, physical e. None of these choices

d. application, presentation, session, physical

what is the common name for PDUs at the Data Link layer? a. datagrams b. packets c. data link PDUs d. frames e. segments

d. frames

the term _______ is used to describe the data frame crossing a router. a. loopback b. routing c. firewall d. hop e. dot quad

d. hop

which of the following terms is a synonym for a dynamically assigned port address, used to service a temporary TCP/IP connection for data exchange? a. protocol number b. well-known port address c. registered port address d. socket address e. dynamic port address

d. socket address

Breaking up an incoming data stream so separate portions may be delivered to the correct applications is called ____.

demultiplexing

which of the following organizations manages internet domain names and network addresses? a. IAB b. ISOC c. IRTF d. IETF e. ICANN

e. ICANN

What version of IP supports 128-bit addresses? a. All of these choices b. IPv5 c. IPv4 and IPv6 d. IPv4 e. IPv6

e. IPv6

The ______ is responsible for the more forward-looking activities of the ISOC, and handles research and development work for topics too far-out or impractical for immediate implementation, but which may (or may not) have a role to play on the internet some day. a. ICANN b. ISO c. Internet Engineering Task Force d. Internet Society e. Internet Research Task Force

e. Internet Research Task Force

The ___ is the parent organization for all the various internet boards and task forces a. Internet Engineering Task Force b. ISO c. ICANN d. Internet Architecture Board e. Internet Society

e. Internet Society

Many PDUs include a characteristic closing component called a ____ that provides data integrity checks for the data portion of the PDU, known as the payload. a. host b. network service c. None of these choices d. well-known protocol e. trailer

e. trailer

In IPv6, the ______ address is all zeroes and can be represented as two colon characters (::) in normal notation. a. multicast b. anycast c. broadcast d. loopback e. unspecified

e. unspecified

Data link layer PDUs are called_______________

frame

Devices that operate on the internet are generically identified as _______________

hosts

The primary function of the OSI Model's _____________ layer is to provide globally unique address to every host on the internet and paths to and from hosts.

network

_____________ is the process of tapping into the network communications system, capturing packets that cross the network, gathering network statistics, and decoding the packets into readable form.

protocol Analysis