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ICDN1 Networking Fundamentals

ICDN1 Networking Fundamentals

Questão 1 de 39

1

The process of HTTP asking TCP to send some data and making sure that it is received
correctly is an example of what?

Selecione uma das seguintes:

  • Same-layer interaction

  • Adjacent-layer interaction

  • OSI model

  • All of these answers are correct.

Explicação

Questão 2 de 39

1

The process of TCP on one computer marking a TCP segment as segment 1, and the
receiving computer then acknowledging the receipt of TCP segment 1 is an example of
what?

Selecione uma das seguintes:

  • Data encapsulation

  • Same-layer interaction

  • Adjacent-layer interaction

  • OSI model

  • All of these answers are correct.

Explicação

Questão 3 de 39

1

The process of a web server adding a TCP header to the contents of a web page, followed
by adding an IP header and then adding a data link header and trailer is an example of
what?

Selecione uma das seguintes:

  • Data encapsulation

  • Same-layer interaction

  • OSI model

  • All of these answers are correct.

Explicação

Questão 4 de 39

1

Which of the following terms is used specifically to identify the entity created when
encapsulating data inside data link layer headers and trailers?

Selecione uma das seguintes:

  • Data

  • Chunk

  • Segment

  • Frame

  • Packet

Explicação

Questão 5 de 39

1

Which OSI layer defines the functions of logical network-wide addressing and
routing?

Selecione uma das seguintes:

  • Layer 1

  • Layer 2

  • Layer 3

  • Layer 4

  • Layer 5,6, or 7

Explicação

Questão 6 de 39

1

Which OSI layer defines the standards for cabling and connectors?

Selecione uma das seguintes:

  • Layer 1

  • Layer 2

  • Layer 3

  • Layer 4

  • Layer 5, 6, or 7

Explicação

Questão 7 de 39

1

Which of the following terms are not valid terms for the names of the seven
OSI layers? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Application

  • Data Link

  • Transmission

  • Presentation

  • Internet

  • Session

Explicação

Questão 8 de 39

1

Which of the following protocols are examples of TCP/IP data link layer protocols?
(Choose two answers.)

Selecione uma ou mais das seguintes:

  • Ethernet

  • HTTP

  • IP

  • UDP

  • SMTP

  • TCP

  • PPP

Explicação

Questão 9 de 39

1

In the LAN for a small office, some user devices connect to the LAN using a cable, while
others connect using wireless technology (and no cable). Which of the following is true
regarding the use of Ethernet in this LAN?

Selecione uma das seguintes:

  • Only the devices that use cables are using Ethernet.

  • Only the devices that use wireless are using Ethernet.

  • Both the devices using cables and those using wireless are using Ethernet.

  • None of the devices are using Ethernet.

Explicação

Questão 10 de 39

1

Which of the following Ethernet standards defines Gigabit Ethernet over UTP cabling?

Selecione uma das seguintes:

  • 10BASE-T

  • 100BASE-T

  • 1000BASE-T

  • None of the other answers is correct.

Explicação

Questão 11 de 39

1

Which of the following is true about Ethernet crossover cables for Fast Ethernet?

Selecione uma das seguintes:

  • Pins 1 and 2 are reversed on the other end of the cable.

  • Pins 1 and 2 on one end of the cable connect to pins 3 and 6 on the other end of the
    cable.

  • Pins 1 and 2 on one end of the cable connect to pins 3 and 4 on the other end of the
    cable.

  • The cable can be up to 1000 meters long to cross over between buildings.

  • None of the other answers is correct.

Explicação

Questão 12 de 39

1

Each answer lists two types of devices used in a 100BASE-T network. If these devices
were connected with UTP Ethernet cables, which pairs of devices would require a straight-
through cable? (Choose three answers.)

Selecione uma ou mais das seguintes:

  • PC and router

  • PC and switch

  • Hub and switch

  • Router and hub

  • Wireless access point (Ethernet port) and switch

Explicação

Questão 13 de 39

1

Which of the following is true about the CSMA/CD algorithm?

Selecione uma das seguintes:

  • The algorithm never allows collisions to occur.

  • Collisions can happen, but the algorithm defines how the computers should notice a
    collision and how to recover.

  • The algorithm works with only two devices on the same Ethernet.

  • None of the other answers is correct.

Explicação

Questão 14 de 39

1

Which of the following are true about the format of Ethernet addresses? (Choose three
answers.)

Selecione uma ou mais das seguintes:

  • Each manufacturer puts a unique OUI code into the first 2 bytes of the address.

  • Each manufacturer puts a unique OUI code into the first 3 bytes of the address.

  • Each manufacturer puts a unique OUI code into the first half of the address.

  • The part of the address that holds this manufacturer’s code is called the MAC.

  • The part of the address that holds this manufacturer’s code is called the OUI.

  • The part of the address that holds this manufacturer’s code has no specific name.

Explicação

Questão 15 de 39

1

Which of the following terms describe Ethernet addresses that can be used to send one
frame that is delivered to multiple devices on the LAN? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Burned-in address

  • Unicast address

  • Broadcast address

  • Multicast address

Explicação

Questão 16 de 39

1

Which of the following best describes the main function of OSI Layer 1 as used in
WANs?

Selecione uma das seguintes:

  • Framing

  • Delivery of bits from one device to another

  • Addressing

  • Error detection

Explicação

Questão 17 de 39

1

In the cabling for a leased line, which of the following typically connects to a four-wire
line provided by a telco?

Selecione uma das seguintes:

  • Router serial interface without internal CSU/DSU

  • CSU/DSU

  • Router serial interface with internal transceiver

  • Switch serial interface

Explicação

Questão 18 de 39

1

Which of the following is an accurate speed at which a leased line can operate in the
United States?

Selecione uma das seguintes:

  • 100 Mbps

  • 100 Kbps

  • 256 Kbps

  • 6.4 Mbps

Explicação

Questão 19 de 39

1

Which of the following fields in the HDLC header used by Cisco routers does Cisco add,
beyond the ISO standard HDLC?

Selecione uma das seguintes:

  • Flag

  • Type

  • Address

  • FCS

Explicação

Questão 20 de 39

1

Two routers, R1 and R2, connect using an Ethernet over MPLS service. The service pro-
vides point-to-point service between these two routers only, as a Layer 2 Ethernet service.
Which of the following are the most likely to be true about this WAN? (Choose two
answers.)

Selecione uma ou mais das seguintes:

  • R1 will connect to a physical Ethernet link, with the other end of the cable
    connected to R2.

  • R1 will connect to a physical Ethernet link, with the other end of the cable
    connected to a device at the WAN service provider point of presence.

  • R1 will forward data link frames to R2 using an HDLC header/trailer.

  • R1 will forward data link frames to R2 using an Ethernet header/trailer.

Explicação

Questão 21 de 39

1

Which of the following Internet access technologies, used to connect a site to an ISP,
offers asymmetric speeds? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Leased lines

  • DSL

  • Cable Internet

  • BGP

Explicação

Questão 22 de 39

1

Fred has just added DSL service at his home, with a separate DSL modem and consumer-
grade router with four Ethernet ports. Fred wants to use the same old phone he was using
before the installation of DSL. Which is most likely true about the phone cabling and
phone used with his new DSL installation?

Selecione uma das seguintes:

  • He uses the old phone, cabled to one of the router/switch device’s Ethernet ports.

  • He uses the old phone, cabled to the DSL modem’s ports.

  • He uses the old phone, cabled to an existing telephone port, and not to any new device.

  • The old phone must be replaced with a digital phone.

Explicação

Questão 23 de 39

1

Which of the following are functions of OSI Layer 3 protocols? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Logical addressing

  • Physical addressing

  • Path selection

  • Arbitration

  • Error recovery

Explicação

Questão 24 de 39

1

Imagine that PC1 needs to send some data to PC2, and PC1 and PC2 are separated by
several routers. Both PC1 and PC2 sit on different Ethernet LANs. What are the largest
entities (in size) that make it from PC1 to PC2? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Frame

  • Segment

  • Packet

  • L5 PDU

  • L3 PDU

  • L1 PDU

Explicação

Questão 25 de 39

1

Which of the following is a valid Class C IP address that can be assigned to a host?

Selecione uma das seguintes:

  • 1.1.1.1

  • 200.1.1.1

  • 128.128.128.128

  • 224.1.1.1

  • 223.223.223.255

Explicação

Questão 26 de 39

1

What is the assignable range of values for the first octet for Class A IP networks?

Selecione uma das seguintes:

  • 0 to 127

  • 0 to 126

  • 1 to 127

  • 1 to 126

  • 128 to 191

  • 128 to 192

Explicação

Questão 27 de 39

1

PC1 and PC2 are on two different Ethernet LANs that are separated by an IP router. PC1’s
IP address is 10.1.1.1, and no subnetting is used. Which of the following addresses could
be used for PC2? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • 10.1.1.2

  • 10.2.2.2

  • 10.200.200.1

  • 9.1.1.1

  • 225.1.1.1

  • 1.1.1.1

Explicação

Questão 28 de 39

1

Imagine a network with two routers that are connected with a point-to-point HDLC serial
link. Each router has an Ethernet, with PC1 sharing the Ethernet with Router1 and PC2
sharing the Ethernet with Router2. When PC1 sends data to PC2, which of the following
is true?

Selecione uma das seguintes:

  • Destination MAC address

  • Source MAC address

  • Destination IP address

  • Source IP address

  • Destination MAC and IP address

Explicação

Questão 29 de 39

1

Which of the following are true about a LAN-connected TCP/IP host and its IP routing
(forwarding) choices? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • The host always sends packets to its default gateway.

  • The host sends packets to its default gateway if the destination IP address is in a different class of IP network than the host.

  • The host sends packets to its default gateway if the destination IP address is in a different subnet than the host.

  • The host sends packets to its default gateway if the destination IP address is in the
    same subnet as the host.

Explicação

Questão 30 de 39

1

Which of the following are functions of a routing protocol? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Advertising known routes to neighboring routers

  • Learning routes for subnets directly connected to the router

  • Learning routes, and putting those routes into the routing table, for routes advertised
    to the router by its neighboring routers

  • Forwarding IP packets based on a packet’s destination IP address

Explicação

Questão 31 de 39

1

A company implements a TCP/IP network, with PC1 sitting on an Ethernet LAN. Which
of the following protocols and features requires PC1 to learn information from some
other server device?

Selecione uma das seguintes:

  • ARP

  • Ping

  • DNS

  • None of the other answers are correct

Explicação

Questão 32 de 39

1

Which of the following is not a feature of a protocol that is considered to match OSI
Layer 4?

Selecione uma das seguintes:

  • Error recovery

  • Flow control

  • Segmenting of application data

  • Conversion from binary to ASCII

Explicação

Questão 33 de 39

1

Which of the following header fields identify which TCP/IP application gets data
received by the computer? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • Ethernet Type

  • SNAP Protocol Type

  • IP Protocol

  • TCP Port Number

  • UDP Port Number

Explicação

Questão 34 de 39

1

Which of the following are typical functions of TCP? (Choose four answers.)

Selecione uma ou mais das seguintes:

  • Flow Control (windowing)

  • Error recovery

  • Multiplexing using port numbers

  • Routing

  • Encryption

  • Ordered data transfer

Explicação

Questão 35 de 39

1

Which of the following functions is performed by both TCP and UDP?

Selecione uma das seguintes:

  • Windowing

  • Error recovery

  • Multiplexing using port numbers

  • Routing

  • Encryption

  • Ordered data transfer

Explicação

Questão 36 de 39

1

What do you call data that includes the Layer 4 protocol header, and data given to Layer
4 by the upper layers, not including any headers and trailers from Layers 1 to 3? (Choose
two answers.)

Selecione uma ou mais das seguintes:

  • L3PDU

  • Chunk

  • Segment

  • Packet

  • Frame

  • L4PDU

Explicação

Questão 37 de 39

1

In the URL http://www.certskills.com/ICND1, which part identifies the web server?

Selecione uma das seguintes:

  • http

  • www.certskills.com

  • certskills.com

  • http://www.certskills.com

  • The file name.html includes the host name.

Explicação

Questão 38 de 39

1

When comparing VoIP with an HTTP-based mission-critical business application, which
of the following statements are accurate about the quality of service needed from the net-
work? (Choose two answers.)

Selecione uma ou mais das seguintes:

  • VoIP needs better (lower) packet loss.

  • HTTP needs less bandwidth.

  • HTTP needs better (lower) jitter.

  • VoIP needs better (lower) delay.

Explicação

Questão 39 de 39

1

Which of the following protocols are examples of TCP/IP transport layer protocols?
(Choose two answers.)

Selecione uma ou mais das seguintes:

  • Ethernet

  • HTTP

  • IP

  • UDP

  • SMTP

  • TCP

Explicação

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