Introduction to network: Local area Networking
Which IEEE 802.1p traffic class represents standard data (best effort) traffic?
0
What is the maximum cable length for 100BaseTx Ethernet?
100 m
Which of the following is a Gigabit Ethernet specification for copper cable?
1000BaseCX
Which of the following is NOT a Gigabit Ethernet fiber cabling specification?
1000BaseFX
Which interfaces are NOT considered parts of the IEEE 802.3ae standard?
10GBaseCX4
Which 10GbE interfaces operate over multimode fiber (MMF) cabling? (Choose two.)
10GBaseLX4 10GBaseSR
According to the Ethernet 5/4/3 rule, how many 10Base2 segments may have nodes attached?
3
What is the maximum length of a 10GbE segment through single-mode fiber (SMF) cable?
40km
The best user experience will be delivered by using which of the following scenarios?
802.11ac access point and 802.11ac device.
Why can IEEE 802.11ac devices deliver data at higher rates than 802.11n devices?
802.11ac increases the maximum number of spatial streams from four in 802.11n to eight
How does a Layer 2 switch differ from a Layer 3 switch?
A Layer 2 switch makes decisions based on media access control (MAC) addresses.
How does a Layer 3 switch differ from a router?
A Layer 3 switch checks the first packet in each stream; a router checks each packet.
A group of computers are connected in a multistory building. This would be considered what type of network?
A local are network
A group of computers in the south side of a city are connected to another group of computers downtown. This would be considered what type of network?
A metropolitan area network (MAN).
What is the difference between a switch and a hub?
A switch allows a dedicated path between two ports.
The network interface card (NIC) in an Ethernet node receives from the Internet protocol (IP) a packet 12 bytes long. What must the NIC do in order to prepare the packet for transmission across the physical network?
Add padding, a header and a trailer.
Encapsulation means that each layer on the sending node does which of the following?
Adds its protocol header to the data
Which component in the remote procedure call (RPC) process provides the correct formatting for the request to the server network operating system (NOS)?
Application programming interface (API).
What is the key reason that smart local area network (LAN) administrators demand well-made cable connections?
Bad cable connections degrade a network's performance.
A peer-to-peer network is a practical solution in which of the following applications? (Choose two.)
Building a simple network supporting a few clients accessing a shared printer Creating an inexpensive solution for a small business just starting out
What unshielded twisted-pair (UTP) cable category supports both 10 Mbps and 100 Mbps Ethernet?
Category 5E
The IEEE 10GBaseT networks operate over which type of cabling?
Category 6 unshielded twisted-pair (UTP).
In a client/server arrangement, where are requests normally generated?
Client
When a Web browser retrieves a hypertext markup language (HTML) document from a web server, this is an example of which of the following?
Client/server communication.
What is the purpose of a redirector?
Direct workstation requests to a client.
What are the advantages of a client/server architecture?
Distributed applications and resource sharing.
Which of the following statements is incorrect regarding Ethernet?
Ethernet can only be used with Category 5E unshielded twisted-pair (UTP) cable.
Which of the following statements are true concerning Ethernet networks? (Choose two.)
Ethernet can use thicknet, thinnet, or twisted pair cable at the Physical Layer. Media access control (MAC) frames are transmitted across the physical media.
What is the most widely installed local area network (LAN) technology?
Ethernet.
Which organization licenses the use of radio frequencies in the US?
FCC
Gigabit Ethernet uses a different frame format than 10 Mbps Ethernet and Fast Ethernet. True or False?
False
In fiber-optic cable, a glass core is used to generate light signals for transmission of digital information. True or False
False
Light emitting diodes (LED) are the typical light source for single-mode fiber-optic cable. True or False
False
When Cat 5E cable is installed, which one of the following technologies can easily be upgraded to from a 10BaseT Ethernet local area network (LAN)?
Fast Ethernet (100 Mbps)
If local area network (LAN) cable is installed within air ducts, it must be plenum grade. Why?
Fire safety
Which Layer 2 switch type reads the first 64-bytes of a frame and then forwards it to the destination interface?
Fragment-free
You are shopping for a new Ethernet switch. You want maximum switch throughput, but also want to avoid passing frames damaged by collisions. Which type of switch should you choose?
Fragment-free
Of the five backup types, which should be performed monthly?
Full backup.
Which of the statements below is incorrect when comparing Gigabit Ethernet to Fast Ethernet technology?
Gigabit Ethernet uses the same speed as Fast Ethernet
Which of the following best describes the functionality of a virtual local area network (VLAN)?
Grouping nodes logically that may be physically separated
What type of device is used with unshielded twisted-pair (UTP) cable to create a star network configuration?
Hub
Which IEEE standard describes vendor-neutral virtual local area network (VLAN) tagging on bridged networks?
IEEE 802.1Q
Which wireless security standard describes Layer 2 port-based network access control?
IEEE 802.1x.
Which Ethernet frame format includes a length field in the media access control (MAC) header?
IEEE 802.3
Which of the following best describes the function of a media access control (MAC) layer address?
Identifies the destination device's physical address
What makes an unshielded twisted-pair (UTP) crossover cable different from a patch cord?
In a crossover cable Pair 1 is wired to Pair 4, Pair 2 is wired to Pair 3, Pair 3 is wired to Pair 2, and Pair 4 is wired to Pair 1. A patch cord uses the same pinout pattern on the connectors at both ends of the cable.
Why would you replace a hub with a switch?
Increase local area network (LAN) performance.
Which capability is NOT provided by Layer 3 switching.
Internet protocol (IP) to name resolution for forwarding.
What does an Ethernet frame addressed with a "1" as the first bit of destination media access control (MAC) address do?
It allows all frames to be multicast to a select group of nodes. It allows all frames to be multicast to a select group of nodes.
Which statement best describes 10 Gigabit Ethernet (10GbE)?
It can be used in place of Fiber Channel (FC) as a storage attachment technology.
Which statement is true concerning Network Equipment Building System (NEBS)?
It ensures equipment compatibility, personal safety, and continued operation during extreme conditions.
What does a print spooler do in a print server environment?
It intercepts print requests on their way to the printer and stores the requests in a print queue on its hard drive or in memory where the print jobs wait to be printed.
Which of the following best describes a local area network (LAN)?
It is confined to a single building or a single floor of a building
Which of the following best describes a metropolitan area network (MAN)?
It spans a single city and uses local telephone company facilities for connectivity
Why do media access control (MAC) address filters alone provide inadequate security on a wireless network?
MAC addresses transmitted within wireless frames are easy to intercept.
Which of the following is NOT a Gigabit Ethernet Physical Layer function?
Media access control (MAC) address assignments
You are installing a large voice and data network in a dusty and dry area of the country. Static discharge is a constant threat to equipment operation and reliability. Which standard assures you that the equipment you are installing will operate reliably up to prescribed dust and ESD levels?
Network Equipment Building System (NEBS).
What three addresses are needed to move data from one application to another across a network?
Network address, network interface card (NIC) address, process address
Why are remote procedure calls (RPC) difficult to implement?
Network conditions can cause delays when passing information between the client and server.
What does NIC stand for?
Network interface card
With what SONET standard is 10GbE compatible?
OC-192
What is a key factor in any power backup system?
Ongoing maintenance and testing of resources.
What types of processes are located on two computers that perform approximately the same services?
Peer
If segmentation occurs on the sending node, what must occur on the receiving node?
Physical Layer
Which of the following layers is only concerned with the physical signals that represent data bits?
Physical Layer
Network interface cards (NIC) operate at which Open Systems Interconnection reference model (OSI/RM) layers? (Choose two.)
Physical Layer Data Link Layer
You configure your computer settings so that the operating system (OS) performs routine hard disk maintenance during idle times. When you return from a coffee break one day, this maintenance is in progress, but it stops as soon as you resume working in your favorite application. What OS feature makes this possible?
Preemptive multitasking.
In a client/server environment, what is the software that determines the destination of a user's request for local area network (LAN) services?
Redirector.
When a client application calls software routines that run on a server application, it is using which of the following?
Remote procedure calls.
Why do routers take more time to process frames than Layer 3 switches do? (select two)
Routers check both frame addresses and packet addresses. Routers make decisions in software; switches make decisions in hardware.
A binary bit that represents a value or its opposite is called which of the following?
Semaphore and flag.
Why would you use a patch panel in an Ethernet network?
Simplify connections between network devices
Which communication process typically is the least intelligent?
Slave
How are store-and-forward switches different than cut-through switches?
Store-and-forward switches are more accurate, but cut-through switches are faster.
Virtual local area networks (VLAN) are typically implemented using which type of device?
Switch
What is the advantage of a switch over a standard hub? (choose two)
Switches isolate traffic per port. Switches can improve network performance by keeping individual workgroup traffic local.
What is the difference between the frame formats of 10 Mbps Ethernet and 100 Mbps Ethernet?
The 10 Mbps Ethernet frame is exactly the same and contains the same fields as the 100 Mbps frame.
Which component must be upgraded to support Fast Ethernet?
The Category 3 cabling
How is Fast Ethernet similar to standard Ethernet?
The same frame format is used. Cat 5E cabling can be used for both. Star configurations are used in both types.
According to the TIA/EIA 568 standards, what purpose do the blue and brown pairs serve in a 4-pair Cat 5E cable?
They are unused by 10/100 half duplex Ethernet but may be used by other technologies.
Which statement is true concerning 10 Gigabit Ethernet (10GbE) Multi-Source Agreements (MSA)?
They describe vendor-developed pluggable optics for interconnecting 10GbE devices.
What is the purpose of the frame check sequence (FCS) field? (Choose two)
To check the Ethernet frame for errors using a cyclic redundancy check (CRC). To ensure the Ethernet frame does not get processed if an error has occurred.
Why is file locking required for multiuser networked applications?
To keep multiple users from changing the same file.
What is a patch cable not used for?
To link a computer directly to another computer
In unshielded twisted-pair (UTP) cable, why is each pair of wires twisted?
To reduce noise and interference
What is the preamble used for?
To synchronize Ethernet network interface cards (NIC) so the bits that make up the frames are received correctly. By the network interface card (NIC) at the Data Link Layer Data Link Layer
What is the primary reason an Ethernet network interface card (NIC) transmits a jamming message?
To warn other stations that a collision has been detected.
What is the primary purpose of a Physical Layer protocol?
Transmit bits across a physical link
What is the primary purpose of a Data Link Layer protocol?
Transmit frames across a physical link
What is the primary purpose of a Transport Layer protocol?
Transmit messages from process to process
What is the primary purpose of a Network Layer protocol?
Transmit packets across a network
A hub may be used to provide connectivity in both a star and star ring network. True or False
True
An organization may use more than one type of topology in a single network. True or False?
True
Category 3 cabling cannot support 100 Mbps Ethernet. True or False?
True
Fiber-optic cable often carries more than one signal at a time. True or False
True
Multimode fiber (MMF) cable has a larger glass diameter than single-mode fiber (SMF). True or False
True
Optical cladding is used to reflect light as it travels down a glass core in a fiber-optic cable. True or False
True
Virtual local area networks (VLAN) can be created using a variety of switch vendor products in the same network. True or False
True
Which of the choices below is a Transport Layer protocol?
User datagram protocol (UDP)
Which Web server platform is favored for speed critical environments?
lighttpd.
