NCTI IV ch 11
Which IEEE 802.1p traffic class represents standard data (best effort) traffic?
0
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
What is the maximum cable length for 100BaseTx Ethernet?
100m
What is the maximum length of a 10GBase-T Ethernet connection using category 7 (CAT-7) shielded twisted-pair (STP) cable?
100m
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
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.
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.
Layer 3 switches do a good job of containing which of the following?
Broadcasts
Where are Ethernet frames processed?
By the network interface card (NIC) at the Data Link Layer
The IEEE 10GBaseT networks operate over which type of cabling?
Category 6 unshielded twisted-pair (UTP).
Devices connected to hubs share the same:
Collision domain
What layer of software is normally loaded on the network interface card (NIC)?
Data Link Layer
What is Ethernet?
Data Link Layer specification for media access control (MAC), which defines how network nodes can use a shared medium to transmit signals to one another.
What is the most widely installed local area network (LAN) technology?
Ethernet
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.
Gigabit Ethernet uses a different frame format than 10 Mbps Ethernet and Fast Ethernet. True or False?
False
Which Layer 2 switch type reads the first 64 bytes of a frame and then forwards it to the destination interface?
Fragment Free
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
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
Which IEEE standard describes vendor-neutral virtual local area network (VLAN) tagging on bridged networks?
IEEE 802.1Q
Which Ethernet frame format includes a length field in the media access control (MAC) header?
IEEE 802.3
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.
Which statement best describes 10 Gigabit Ethernet (10GbE)?
It can be used in place of Fiber Channel (FC) as a storage attachment technology.
Which of the following is NOT a Gigabit Ethernet Physical Layer function?
Media access control (MAC) address assignments
With what SONET standard is 10GbE compatible?
OC-192
With what synchronous optical network (SONET) standard is 10GBase-EW/LW/SW compatible?
OC-192
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
How are store-and-forward Ethernet switches different from cut-through switches?
Store and forward switches are more accurate, but cut through switches are faster.
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 can improve network performance by keeping individual workgroup traffic local Switches isolate traffic per port.
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
A small company's chief technology officer (CTO) wants to upgrade their existing network to Fast Ethernet. The existing network consists of the following:• 10/100 Network interface cards (NIC) in the server and workstations• 10/100 Hubs• Category 3 and 5E cabling• A 10/100 routerWhich 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
A user's personal computer (PC) is connected to a virtual local area network (VLAN) trunk link. What will most likely happen as the switch forwards tagged frames to the PC?
The switch will identify improperly tagged frames as invalid and drop them.
How does IEEE 802.3 frame format differ from Ethernet Version 2 frame format?
The type field is replaced with the length field.
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.
What is the primary reason to build a virtual local area network (VLAN)?
To minimize broacast traffic.
What is the preamble used for?
To synchronize Ethernet network interface cards (NIC) so the bits that make up the frames are received correctly.
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.
Virtual local area networks (VLAN) can be created using a variety of switch vendor products in the same network. True or False
True
