Block 4 Question

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

B

Which of the following header fields identify which TCP/IP application gets data received by the computer? (pick 2) A. Ethernet B. SNAP Protocol C. IP Protocol D. TCP Port number E. UDP Port number

D E

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?(pick 2) 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

D, F

What is the assignable range of values for the first octet for a class A IP networks? A. 0 - 127 B. 0 - 126 C. 1 - 127 D. 1 -126 E. 128 - 191 F. 128 - 192

D. 1 - 126

Which of the following are functions of a routing protocol?(2) 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 , C

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 the above

A Data encapsulation Encapsulation-The placement of data from higher-layer protocol behind the header(in some case, between a header and a trailer) of the next-lower-layer protocol.

Which of the following are typical functions of TCP? (Pick 4) A. Flow control(windowing) B. Error recovery C. Multiplexing using port numbers D. Routing E. Encryption F. Ordered data transfer

A, B, C, F

Which of the following are functions of OSI layer protocols? (pick 2) A. Logical addressing B. Physical addressing C. Path selection D. Arbitration E. Error recovery

A, C Logical addressing- A generic reference to address as defined by layer 3 protocols that do not have to be concerned with the physical details of the underlying physical media. Used mainly to contrast these addresses with data link addresses, which are generically considered to be physical address because they differ based on the type of physical medium.

Which OSI layer defines the standards for cabling and connectors? A. Layer 1 B. Layer 2 C. Layer 3 D. Layer 4 E. Layer 5, 6, and 7

A. Layer 1 ( physical) This layer defines the physical characteristics of the transmission medium, including connectors, pins, use of pins, electrical currents, encoding, light modulation, and so on.

In the LAN for a small office, some user devices connect to the LAN using cable, while others connect using wireless. 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 are using wireless are using Ethernet C. Both are using Ethernet D. Neither are using Ethernet

A. Only the devices that use cables are using Ethernet Ethernet- A series LAN standards defined by the IEEE. originally invented by Xerox Corporation and developed jointly by Xerox, Intel, and Digital Equipment Corporation.

Which of the following are true about LAN-connected TCP/IP host and its IP routing(forwarding) choices? (2) 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 is in a different subnet that the host. D. The host sends packets to its default gateway if the destination IP is in the same subnet as the host.

B , C

The process of HTTP asking TCP to send some data and making sure that is received correctly is an example of what? A. Same-layer interaction. B. Adjacent-layer interaction C. OSI Model D. All of the above

B Adjacent-Layer interaction The general topic of how on one computer, two adjacent layers in a networking architectural model work together, with the lower layer providing services to the higher layer.

Which of the following are true about the format of Ethernet addresses? (Pick 3) A. Each Manufacturer puts a unique OUI code into the 1st 2 bytes of the address. B.Each Manufacturer puts a unique OUI code into the 1st 3 bytes of the address. C. Each Manufacturer puts a unique OUI code into the 1st half of the address. D. The part of the address that holds this manufacturer's code is called MAC. E. The part of the address that holds this manufacturer's code is called OUI. F.The part of the address that holds this manufacturer's code has no specific name.

B, C, E OUI - Organizationally Unique Identifier

Which of the id true about 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 above

B. CSMA/CD- Carries sense multiple access with collision detection. A media-access mechanism in which devices ready to transmit data first check the channel for a carrier. If no carrier is sense for a specific period of time, a device can transmit. If two devices transmit at once, a collision occurs and is detected by all colliding devices. This collision subsequently delays retransmissions from those devices for some random length of time.

The process of TCP on one computer marking a TCP segment 1 and the receiving computer then acknowledging the receipt of TCP segment 1 is example of what? A. Data encapsulation B. Same-layer interaction C. Adjacent-layer interaction D. OSI model E. All of the above

B. Same-layer interaction The communication between two networking devices for the purpose of the function defined at a particular layer of a networking model, with that communication happening by using a header defined by that layer of the model. The two devices set values in the header, send the header and encapsulated data, with the receiving devices interpreting the header to decide what action to take.

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 above

C

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 addresses

C

Which of the following functions is performed by both TCP and UDP? A. Flow control(windowing) B. Error recovery C. Multiplexing using port numbers D. Routing E. Encryption F. Ordered data transfer

C

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, and 7

C Layer 3 ( Network Layer) Like the TCP/IP 's network(Internet) layer, this layer defines logical addressing , routing(forwarding), and the routing protocols used to learn routes.

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. (Pick 2) A. Burned-in address B. Unicast address C. Broadcast address D. Multicast address

C, D

You open a web browser and connect to the www.1bravo4.com website. Which of the following are typically true about what happens between your web browser and the web server?( pick 2) A. Messages flowing toward the server use UDP destination port 80. B. Messages flowing from the server typically use RTP. C. Messages flowing to the client typically use a source TCP port number of 80. D. Messages flowing to the server typically use TCP.

C, D

What do you call data that includes the layer 4 protocol header, and data given to layer 4 by the upper layers, not including and headers and trailers from layer 1 to 3? (pick 2) A. L3PDU B. Chunk C. Segment D. Packet E. Frame F. L4DPU

C, F Layer 4 = Transport Layer Segment - In TCP, a term used to describe a TCP header and its encapsulation data( also know as L4DPU)

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. FCS- Frame Check Sequence - A field in many data link trailers used as part of the error-detection process.

Which of the following Ethernet standards defines Gigabit Ethernet over UTP cabling? A. 10GBASE-T B. 100GBASE-T C. 1000BASE-T D. None of the above

C. 1000BASE-T Gigabit Ethernet- The common name for all the IEEE standards that send data at 1 gigabit per second.

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

D. Frame A term referring to a data link header an trailer, plus encapsulated between the header and trailer.

Which of the following protocols are examples of TCP/IP data link layer protocols? Ethernet , HTTP, IP, UDP, SMTP TCP, PPP Choose 2

Ethernet and PPP

Which of the following protocols are examples of TCP/IP transport layer protocols? Ethernet , HTTP, IP, UDP, SMTP TCP Choose 2

UDP and TCP