ICND1 - Part 1 Quiz Flashcards
How does TCP guarantee delivery of data across a network?
a. By using sequence numbers in the UDP header.
b. By using a system of checks to ensure that all data has been delivered.
c. By using a TCP header containing a sequence number.
d. By receiving all data part of a stream and then checking to see if any data is missing.
c. By using a TCP header containing a sequence number.
What is the data unit called at layer 2?
a. Segment
b. Data
c. Frame
d. Packet
e. Bit
c. Frame
What is the process of encapsulation?
a. The concept of adding a chunk of data to a packet.
b. The concept of adding a header and trailer to a segment, packet, or frame.
c. The concept of removing a header and trailer from a segment, packet, or frame.
d. The concept of removing data from a frame.
b. The concept of adding a header and trailer to a segment, packet, or frame.
What type of device is commonly associated to layer 4 of the OSI model?
a. Computers
b. Switches
c. Routers
d. Firewalls
e. Hubs
d. Firewalls
What are two benefits of the OSI model? (Choose 2)
a. Enhances the ability to combine large concepts.
b. Helps maintain multivendor interoperability.
c. Enables vendors use their own interfaces with standards.
d. Assists in letting developers build software that works at different layers.
b. Helps maintain multivendor interoperability.
d. Assists in letting developers build software that works at different layers.
What is the maximum cable length by standard for 1000BASE-T?
a. 10 meters
b. 10 yards
c. 100 yards
d. 500 feet
e. 5000 meters
f. 100 meters
f. 100 meters
What is the maximum cable length by standard for 10GBASE-T?
a. 10 feet
b. 100 meters
c. 100 yards
d. 1000 meters
b. 100 meters
In a typical single building enterprise, what is the appropriate design? (Choose the best answer)
a. A switch and router on each floor
b. A wireless access point on each floor and a single switch on the first floor.
c. A wireless access point and switch on each floor supported by a router at the edge.
d. A switch and router at each floor with a wireless access point for mobile support.
c. A wireless access point and switch on each floor supported by a router at the edge.
What is the difference between UTP and STP?
a. UTP has 4 pairs of wires.
b. STP has 4 pairs of wires using all 4 pairs of copper for data.
c. UTP does not utilize a shielding for EMI.
d. STP has a shielding for EMI and only uses 2 pairs of copper for data.
c. UTP does not utilize a shielding for EMI.
Which Ethernet standard uses two pairs of wires for data transmission and what pins are used?
a. 1000BASE-T – 1,2,3,6
b. 10BASE-FX – 1,4,5,7
c. 100BASE-T - 1,2,7,8
d. 10BASE2 – 1,2,3,8
e. 100BASE-T – 1,2,3,6
f. 1000BASE-T – 1,4,5,6
e. 100BASE-T – 1,2,3,6
What types of devices does a straight-through cable connect to? (Choose 2)
a. Routers to Switches
b. Switches to Switches
c. PCs to Routers
d. Wireless access points to wireless access points
e. PCs to Switches
f. PCs to PCs
a. Routers to Switches
e. PCs to Switches
What is in the trailer of an Ethernet frame?
a. SFD
b. Preamble
c. Type
d. FCS
e. Source & Destination
f. Data & Pad
d. FCS
How large of MAC addresses?
a. 4 bytes
b. 32 bits
c. 48 bits
d. 64 bytes
e. 64 bits
f. 8 bits
c. 48 bits
Choose a viable MAC address from the list below.
a. 00-12-6G-FF-11-34
b. Z0-19-00-00-16-65
c. 01-54-A0-69-AA-BC
d. 65-76-90-11-M4-23
e. AB-CD-32-11-00-1H
c. 01-54-A0-69-AA-BC
What is the broadcast Ethernet or MAC address on a network?
a. AAAA.AAAA.AAAA
b. 0000.0000.0000
c. 1111.1111.1111
d. GGGG.GGGG.GGGG
e. EEEE.EEEE.EEEE
f. FFFF.FFFF.FFFF
f. FFFF.FFFF.FFFF
What is a multicast address?
a. An address for all devices on a network
b. An address for one device on a network
c. An address for a vendor specific device
d. An address for a subnet of all devices on a network
d. An address for a subnet of all devices on a network
Error detection is the same as error recovery in that error detection uses the FCS field in an Ethernet trailer.
a. True
b. False
b. False
What is half-duplex in comparison to full-duplex? (Choose 2)
a. Half-duplex can send and receive at the same time.
b. Half-duplex must wait to send if it is receiving data.
c. Full-duplex can send and receive at the same time.
d. Full-duplex uses all pairs on the Ethernet cable.
b. Half-duplex must wait to send if it is receiving data.
c. Full-duplex can send and receive at the same time.
At what layer to hubs operate?
a. Layer 1
b. Layer 2
c. Layer 3
d. Layer 4
e. Layer 5
f. Layer 6
g. Layer 7
h. Layer 8
a. Layer 1
Leased lines are WAN connections that can transmit data over very large distances.
a. True
b. False
a. True
A T1 circuit is an example of a leased line that operates at 1.544 Mbps.
a. True
b. False
a. True
What does customer premises equipment generally contain?
a. CSU/DSU, switch, and computer
b. Router, computer, and switch
c. Serial interface card, CSU/DSU, and a router
d. Hub, router, and T1
c. Serial interface card, CSU/DSU, and a router
A DCE cable has what responsibility?
a. Provide the end with the clocking.
b. Provide the end with a terminator for the router.
c. Receive clocking from the router.
d. A DCE cable and a DTE cable provide the same functions.
a. Provide the end with the clocking.
What is HDLC?
a. A layer 2 WAN protocol ensuring data delivery to LANs.
b. A leased line permitting the bits to traverse the physical cable.
c. A layer 4 WAN protocol ensuring delivery of data across the LANs.
d. A layer 3 WAN protocol ensuring deliver of data across the WAN.
a. A layer 2 WAN protocol ensuring data delivery to LANs.
What two things does EoMPLS provide?
(Choose 2)
a. A point-to-point connection between two customer devices.
b. A multipoint connection between multiple customer devices.
c. Behavior as if a fiber Ethernet link existed between the two customer devices.
d. A multipoint fiber Ethernet link between two customer devices.
a. A point-to-point connection between two customer devices.
c. Behavior as if a fiber Ethernet link existed between the two customer devices.
DSL is a short high-speed WAN between a telco customer and an ISP.
a. True
b. False
a. True
A DSL connection consists of a modem connecting to a telephone wall jack permitting both data and telephone calls. This DSL connection then connects via a telephone line back to the Telco CO to a DSLAM.
a. True
b. False
a. True
When do PCs on a LAN send packets to the default router?
a. When the address is on the same network.
b. When the address is on a different network.
c. When the address is local to the switch.
d. When the address is a broadcast.
e. When the address is a multicast.
b. When the address is on a different network.
What is ARP?
a. The automatic learning of IP addresses on the LAN.
b. The automatic learning of data-link IP addresses on the LAN.
c. The automatic learning of data-link Ethernet addresses on the LAN.
d. The automatic learning of network Ethernet addresses on the WAN.
c. The automatic learning of data-link Ethernet addresses on the LAN.
What are two fields in an IPv4 header? (Choose 2)
a. Version
b. Source IP Address
c. MAC Address
d. FCS
a. Version
b. Source IP Address
An IP address is how many bits in length?
a. 24 bits
b. 16 bits
c. 64 bits
d. 48 bits
e. 32 bits
f. 8 bits
e. 32 bits
All IP addresses in the same group should be separated by a router.
a. True
b. False
b. False
IP addresses separated from each other by a router must be in different groups.
a. True
b. False
a. True
Which of the following is a valid Class B address?
a. 10.0.0.0
b. 126.0.20.99
c. 224.0.0.5
d. 192.0.0.0
e. 172.16.0.12
e. 172.16.0.12
Which of the following is a valid Class A address?
a. 41.0.1.1
b. 129.0.1.56
c. 200.0.143.67
d. 244.23.500.1
e. 0.0.0.0
a. 41.0.1.1
How many usable addresses are in a Class C address?
a. 126
b. 255
c. 256
d. 64
e. 201
f. 254
f. 254
What is the first step in router forwarding logic?
a. Determine where the packet is headed.
b. Ensure the frame has no errors by checking the FCS field.
c. Encapsulate the IP packet in a new data-link header and trailer for the outgoing interface.
d. Discard the old data-link header and trailer
b. Ensure the frame has no errors by checking the FCS field.
What are three goals of a routing protocol? (Choose 3)
a. To dynamically learn and fill the routing table with a route to each subnet in the internetwork.
b. Inform other switches of failed routes on the internetwork and have the switches remove the route.
c. To detect routing loops
d. To prevent routing loops.
e. Choose the best route to a subnet and place it in the routing table.
f. If a route is removed from the routing table, drop all traffic until that route has become active again.
a. To dynamically learn and fill the routing table with a route to each subnet in the internetwork.
d. To prevent routing loops.
e. Choose the best route to a subnet and place it in the routing table.
DNS is a protocol that enables a device to find an IP address by the listed hostname or address.
a. True
b. False
a. True
An ARP request is the act of a device asking “If this is your MAC address, please reply with your IP address”.
a. True
b. False
b. False
Ping is a tool for testing basic network connectivity utilizing the ICMP protocol.
a. True
b. False
a. True
TCP has which of the following transport layer features? (Choose 3)
a. Error Recovery by the process of numbering and acknowledging data with sequence and acknowledgement header fields.
b. TCP flow control using windowing.
c. Uniplexing using ports for WAN protocols.
d. Ordered data transfer and data segmentation.
e. Best effort data connection establishment and termination.
a. Error Recovery by the process of numbering and acknowledging data with sequence and acknowledgement header fields.
b. TCP flow control using windowing.
d. Ordered data transfer and data segmentation.
Multiplexing is the concept of telling a device which application to give the received data.
a. True
b. False
a. True
Multiplexing relies on three things to differentiate data: (Choose 4)
a. IP Address
b. Socket
c. Port Number
d. FCS
e. Transport Protocol
f. MAC Address
g. Ethernet Protocol
a. IP Address
b. Socket
c. Port Number
e. Transport Protocol
Ports above 1024 are considered well known port numbers.
a. True
b. False
b. False
FTP is on which ports?
a. 2000
b. 2001
c. 21
d. 43
e. 22
f. 20
g. 161
c. 21
f. 20
WWW is on which port?
a. 8000
b. 4043
c. 1024
d. 80
e. 443
d. 80
The TCP three way hand shake consists of which of the following?
a. SYN – SYN, ACK – ACK
b. SYN – ACK – SYN,ACK
c. ACK – SYN, SYN – ACK
d. SYN – SYN, ACK, SYN
a. SYN – SYN, ACK – ACK
A connectionless protocol is a protocol that requires the exchange of messages and does not require a pre-established correlation between two endpoints.
a. True
b. False
b. False
Windowing or a “sliding window” is which of the following?
a. The controlling of how many errors can be handled at one time.
b. The controlling of how much data is being sent right now.
c. The controlling of how much data is not being sent right now.
d. The adjustment of how many UDP ACKs are received right now.
b. The controlling of how much data is being sent right now.
