Lesson 11
What is the maximum cable length for 100BaseTx Ethernet
100 m
Which 10GbE interfaces operate over multimode fiber
10GBaseLX4 and 10GBaseSR
What is the maximum length of a 10GbE segment through single-mode fiber (SMF) cable
40 km
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.
The IEEE 10GBaseT networks operate over which type of cabling
Category 6 unshielded twisted-pair (UTP)
Which Layer 2 switch type reads the first 64-bytes of a frame and then forwards it to the destination interface
Fragment-free
1000BaseCX
Gigabit Ethernet specification for copper cable
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
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
10 Gigabit Ethernet (10GbE)
It can be used in place of Fiber Channel (FC) as a storage attachment technology
With what SONET standard is 10GbE compatible
OC-192
Why do routers take more time to process frames than Layer 3 switches do?
Routers make decisions in software; switches make decisions in hardware.
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
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
To ensure the Ethernet frame does not get processed if an error has occurred and to check the Ethernet frame for errors using a cyclic redundancy check (CRC)
What is the preamble used for
To synchronize Ethernet network interface cards (NIC) so the bits that make up the frames are received correctly
