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?

a. Only the devices that use cables are using Ethernet.

b. Only the devices that use wireless are using Ethernet.

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

d. None of the devices are using Ethernet.

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

a. 10GBASE-T

b. 100BASE-T

c. 1000BASE-T

d. None of the other answers is correct.

C. 1000BASE-T

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

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

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

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

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

e. None of the other answers is correct.

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

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.)

a. PC and router

b. PC and switch

c. Hub and switch

d. Router and hub

e. Wireless access point (Ethernet port) and switch

B. PC and switch

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

a. The algorithm never allows collisions to occur.

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

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

d. None of the other answers is correct.

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

Which of the following is true about the Ethernet FCS field?

a. Ethernet uses FCS for error recovery.

b. It is 2 bytes long.

c. It resides in the Ethernet trailer, not the Ethernet header.

d. It is used for encryption.

C. It resides in the Ethernet trailer, not the Ethernet header.

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

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

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

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

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

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

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

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

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

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

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.)

a. Burned-in address

b. Unicast address

c. Broadcast address

d. Multicast address

C. Broadcast address

D. Multicast address

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

a. Ethernet

b. HTTP

c. IP

d. UDP

e. SMTP

f. TCP

 UDP

 TCP

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

a. Ethernet

b. HTTP

c. IP

d. UDP

e. SMTP

f. TCP

g. PPP

ETHERNET

PPP

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

a. Same-layer interaction

b. Adjacent-layer interaction

c. OSI model

d. All of these answers are correct.

Adjacent-layer interaction

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?

a. Data encapsulation

b. Same-layer interaction

c. Adjacent-layer interaction

d. OSI model

e. All of these answers are correct

Same-layer interaction

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?

a. Data encapsulation

b. Same-layer interaction

c. OSI model

d. All of these answers are correct.

Data encapsulation

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

a. Data

b. Chunk

c. Segment

d. Frame

e. Packet

Frame

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

a. Layer 1

b. Layer 2

c. Layer 3

d. Layer 4

e. Layer 5, 6, or 7

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

a. Application

b. Data link

c. Transmission

d. Presentation

e. Internet

f. Session

Transmission

Session

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

a. Framing

b. Delivery of bits from one device to another

c. Addressing

d. Error detection

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

a. Router serial interface without internal CSU/DSU

b. CSU/DSU

c. Router serial interface with internal transceiver

d. Switch serial interface

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

a. 100 Mbps

b. 100 Kbps

c. 256 Kbps

d. 6.4 Mbps

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

a. Flag

b. Type

c. Address

d. FCS

Two routers, R1 and R2, connect using an Ethernet over MPLS service. The service provides 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.)

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

b. 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.

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

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

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 Ethernet header/trailer.

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

a. Leased lines

b. DSL

c. Cable Internet

d. BGP

b. DSL

c. Cable Internet

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?

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

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

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

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

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

a. Logical addressing

b. Physical addressing

c. Path selection

d. Arbitration

e. Error recovery

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.)

a. Frame

b. Segment

c. Packet

d. L5 PDU

e. L3 PDU

f. L1 PDU

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

a. 1.1.1.1

b. 200.1.1.1

c. 128.128.128.128

d. 224.1.1.1

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

a. 0 to 127

b. 0 to 126

c. 1 to 127

d. 1 to 126

e. 128 to 191

f. 128 to 192

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.)

a. 10.1.1.2

b. 10.2.2.2

c. 10.200.200.1

d. 9.1.1.1

e. 225.1.1.1

f. 1.1.1.1

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?

a. Router1 strips the Ethernet header and trailer off the frame received from PC1, never to be used again.

b. Router1 encapsulates the Ethernet frame inside an HDLC header and sends the frame to Router2, which extracts the Ethernet frame for forwarding to PC2.

c. Router1 strips the Ethernet header and trailer off the frame received from PC1, which is exactly re-created by Router2 before forwarding data to PC2.

d. Router1 removes the Ethernet, IP, and TCP headers and rebuilds the appropriate headers before forwarding the packet to Router2.

Which of the following does a router normally use when making a decision about routing TCP/IP packets?

a. Destination MAC address

b. Source MAC address

c. Destination IP address

d. Source IP address

e. Destination MAC and IP address

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

a. The host always sends packets to its default gateway.

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

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

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

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

a. Advertising known routes to neighboring routers

b. Learning routes for subnets directly connected to the router

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

d. Forwarding IP packets based on a packet’s destination IP address

 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?

a. ARP

b. ping

c. DNS

d. None of the other answers are correct