Part 1 Review
Which of the following protocols are examples of TCP/IP transport layer protocols? (Choose Two)
Ethernet
HTTP
IP
UDP
SMTP
TCP
Which of the following protocols are examples of TCP/IP data link layer protocols? (Choose Two)
Ethernet
HTTP
IP
UDP
SMTP
TCP
PPP
The process of HTTP asking TCP to send some data and making sure that it is received correctly is an example of what?
Same-layer interaction
Adjacent-layer interaction
OSI Model
All of these answers are correct
The process of TCP on one computer marking a TCP segment as a segment 1, and the receiving computer then acknowledging the receipt of TCP segment 1 is an example of what?
Data Encapsulation
Same-layer interaction
Adjacent-layer interaction
OSI Model
All of these answers are correct
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?
Data encapsulation
Same-layer interaction
OSI Model
All of these answers are correct
Which of the following terms is used specifically to identify the entity created when encapsulating data inside data link layer headers and trailers?
Data
Chunk
Segment
Frame
Packet
Which OSI layer defines the functions of logical network-wide addressing and routing?
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5, 6, or 7
Which OSI layer defines the standards for cabling and connectors?
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5, 6, or 7
Which of the following terms are not valid terms for the names of the seven OSI layers? (Choose Two)
Application
Data link
Transmission
Presentation
Internet
Session
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?
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
Which of the following Ethernet standards defines Gigabit Ethernet over UTP cabling?
10GABSE-T
100BASE-T
1000BASE-T
None of the other answers are correct
Which of the following is true about Ethernet crossover cables for Fast Ethernet?
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
Each answer list 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)
PC and router
PC and switch
Hub and switch
Router and hub
Wireless access point (Ethernet port) and switch
Which of the following is true about the CSMA/CD algorithm?
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 are correct
Which of the following are correct about the Ethernet FCS field?
Ethernet uses FCS for error recovery
It is 2 bytes long
It resides in the Ethernet trailer, not the Ethernet header
It is used for encryption
Which of the following are true about the format of Ethernet addresses? (Choose Three)
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
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)
Burned-in address
Unicast address
Broadcast address
Multicast address
Which of the following best describes the main function of OSI Layer 1 as used in WANS?
Framing
Delivery of bits from one device to another
Addressing
Error detection
In the cabling for a leased line, which of the following typically connects to a frame wire line provided by a telco?
Router serial interface without internal CSU/DSU
CSU/DSU
Router serial interface with internal transceiver
Switch serial interface
Which of the following is an accurate speed at which a leased line can operate in the United States?
100 Mbps
100 Kbps
256 Kbps
6.4 Mbps
Which of the following fields in the HDLC header used by the Cisco routers does Cisco add, beyond the ISO standard HDLC?
Flag
Type
Address
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)
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 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
Which of the following Internet access technologies, used to connect a site to an ISP, offers asymmetric speeds? (Choose Two)
Leased lines
DSL
Cable Internet
BGP
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?
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 port
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
Which of the following are functions of OSI Layer 3 protocols? (Choose Two)
Logical addressing
Physical addressing
Path selection
Arbitration
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)
Frame
Segment
Packet
L5 PDU
L3 PDU
L1 PDU
Which of the following is a valid Class C IP address that can be assigned to a host?
1.1.1.1
200.1.1.1
128.128.128.128
224.1.1.1
What is the assignable range of values of the first octet for Class A IP network?
0 to 127
0 to 126
1 to 127
1 to 126
128 to 191
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)
10.1.1.2
10.2.2.2
10.200.200.1
9.1.1.1
225.1.1.1
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?
Router1 strips the Ethernet header and trailer off the frame received from PC1, never to be used again
Router1 encapsulates the Ethernet frame inside an HDLC header and sends the frame to Router2, which extracts the Ethernet frame for forwarding to PC2
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
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?
Destination MAC address
Source MAC address
Destination IP address
Source IP address
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)
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 as the host
The host sends packets to its default gateway is the destination IP address is in the same subnet as the host
Which of the following are functions of a routing protocol? (Choose Two)
Advertising known routes to neighbouring routes
Learning routes for subnets directly connected to the router
Learning routes, and putting those routers into routing table, for routers advertised to the router by its neighbouring routers
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?
ARP
Ping
DNS
None of the other answers are correct
Which of the following is not a feature of a protocol that is considered to match OSI Layer 4?
Error recovery
Flow control
Segmenting of application data
Conversation from binary to ASCII
Which of the following header fields identify which TCP/IP application gets data received by the computer? (Choose Two)
Ethernet Type
SNAP Protocol Type
IP Protocol
TCP Port Number
UDP Port Number
Which of the following are typical functions of TCP? (Choose Four)
Flow Control (windowing)
Error recovery
Mulitplexinng using port numbers
Routing
Encryption
Ordered data transfer
Which of the following functions is performed by both TCP and UDP?
Windowing
Error recovery
Multiplexing using port numbers
Routing
Encryption
Ordered data transfer
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 Layer 1 to 3? (Choose Two)
L3PDU
Chunk
Segment
Packet
Frame
L4PDU
In the URL http://www.certskills.com/ICND1, which part identifies the web server?
Http
Www.certskills.com
certskills.com
Http://www.certskills.com
The file name.html includes the host name
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 network? (Choose Two)
VoIP needs better (lower) packet loss
HTTP needs less bandwidth
HTTP needs better (lower) jitter
VoIP needs better (lower) delay
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