Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

CCIE > CCIE R&S > Flashcards

CCIE R&S Flashcards

1
Q

Ethernet T568A Wiring

A
  1. White/Green
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Ethernet 568B Wiring

A
  1. White/Orange
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

disable Ethernet auto-negotiation?

A

speed and duplex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

d. LLC Control

A

B and C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Which standard defines a Fast Ethernet standard?

A

IEEE 802.3u

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

d. Multicasts

A

A, B, D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

d. Source port configured as a trunk

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

e. Only three SPAN sessions may be configured on one switch.

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Which pins are connected on a cross-over cable?

A

1 and 3; 2 and 6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

How do switches dynamically detect the speed setting on a particular Ethernet segment?

A

Fast Link Pulses (FLP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Define CSMA/CD

A

Carrier Sense Multiple Access with Collision Detection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

Define a collision domain.

A

A set of devices that can send frames that collide with frames sent by another device in that same set of devices.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Define Ethernet Field Preamble (DIX)

A

Provides synchronization and signal transitions to allow proper clocking of the transmitted signal. Consists of 62 alternating 1s and 0s, and ends with a pair of 1s.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Define Ethernet Field Preamble and Start of Frame Delimiter (802.3)

A

Same purpose and binary value as DIX preamble; 802.3 simply renames the 8-byte DIX preamble as a 7-byte preamble and a 1-byte Start of Frame Delimiter (SFD).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Define Ethernet Field Type (or Protocol Type) (DIX)

A

2-byte field that identifies the type of protocol or protocol header that follows the header. Allows the receiver of the frame to know how to process a received frame.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Define Ethernet Field Destination Service Access Point (802.2)

A

DSAP; 1-byte protocol type field. The size limitations, along with other uses of the low-order bits, required the later addition of SNAP headers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Define Ethernet Field Source Service Access Point (802.2)

A

SSAP; 1-byte protocol type field that describes the upper-layer protocol that created the frame.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

Define Ethernet Field Control (802.2)

A

1- or 2-byte field that provides mechanisms for both connectionless and connection-oriented operation. Generally used only for connectionless operation by modern protocols, with a 1-byte value of 0x03.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Define Ethernet Field Organizationally Unique Identifier (SNAP)

A

OUI; 3-byte field, generally unused today, providing a place for the sender of the frame to code the OUI representing the manufacturer of the Ethernet NIC.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

Define Ethernet Field Type (SNAP)

A

2-byte Type field, using same values as the DIX Type field, overcoming deficiencies with size and use of the DSAP field.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

What is the meaning of the Individual/Group bit?

A

Bit 8 in the 1st byte of the MAC address. Binary 0 means the address is a unicast; Binary 1 means the address is a multicast or broadcast.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

What is the meaning of the Universal/Local bit?

A

Bit 7 in the 1st byte of the MAC address. Binary 0 means the address is vendor assigned; Binary 1 means the address has been administratively assigned, overriding the vendor-assigned address.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

List the LAN Switch Forwarding behaviors for types of addresses

A

Known unicast: Forwards frame out the single interface associated with the destination address

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

Define SPAN and RSPAN

A

Switch Port Analyzer and Remote Switch Port Analyzer. SPAN and RSPAN mirrors received or transmitted (or both) traffic on a source port and received traffic on one or more source ports or source VLANs, to a destination port for analysis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
What are the restricions of SPAN and RSPAN?
#NAME?
72
What are the restricions of SPAN/RSPAN traffic types?
- For Rx SPAN, each frame to be transported across a SPAN connection is copied and sent before any modification (VACL or ACL, QoS, etc
75
Identify the commands used to configure SPAN
monitor session source interface [rx | tx]
78
Identify the commands used to configure RSPAN
(config)# vlan
82
Which standards define Gigabit Ethernet standard?
IEEE 802.3z for optical
84
What is the IEEE 802.3 standard?
Called MAC due to the name of the IEEE committee (Media Access Control); original Layer 1 and 2 specifications, standardized using DIX V2 as a basis
85
What is the IEEE 802.2 standard?
Called LLC due to the name of the IEEE committee (Logical Link Control); Layer 2 specification for header common to multiple IEEE LAN specifications
86
What are the types of switching methods?
Store-and-Forward: receives all bits in the frame before forwarding the frame
89
What is the command to display the MAC address table?
show mac address-table [aging-time | count | dynamic | static]
91
What is the command to display the status of a SPAN?
show monitor session session-id
92
List the UTP Cabling standards and Max Speed Rating
Cat-1: Phone Only, not data
98
What is 10BASE5?
Thick coaxial - 500m max distance
99
What is 10BASE2?
Thin coaxial - 185m max distance
100
What is 10BASE-T?
UTP Cat 3, 4, 5, 5e, 6 - 100m max distance
101
What is 100BASE-FX?
Two strand MM - 400m max distance
102
What is 100BASE-T?
UTP Cat 3, 4, 5, 5e, 6, 2 pair - 100m max distance
103
What is 100BASE-T4?
UTP Cat 3, 4, 5, 5e, 6, 4 pair - 100m max distance
104
What is 100BASE-TX?
UTP Cat 3, 4, 5, 5e, 6, or STP, 2 pair - 100m max distance
105
What is 1000BASE-LX?
Long-wavelength laser, MM or SM fiber - 10km (SM) or 3 km (MM) max distance
106
What is 1000BASE-SX?
Short-wavelength laser, MM fiber - 220 m (62.5-micron) or 550m (50-micron) max distance
107
What is 1000BASE-ZX?
Extended-wavelength laser, SM fiber - 100km max distance
108
What is 1000BASE-CX?
Shielded Twisted Pair (STP), 2 pair - 25 m max distance
109
What is 1000BASE-T?
UTP Cat 5, 5e, 6, 4 pair - 100 m max distance
110
What is loopback circuitry?
Used by NICs operating in half-duplex mode. This circuitry loops the transmitted frame back to the receive side of the NIC, so that when the NIC receives a frame over the cable, the combined looped-back signal and received signal allows the NIC to notice that a collision has occurred.
111
What is a unicast MAC address?
MAC Address that represents a single LAN interface. The I/G bit, the most significant bit in the most significant byte, is set to 0.
112
What is a broadcast MAC address?
An address that means "all devices that reside on this LAN right now." Always a value of hex FFFFFFFFFFFF.
113
What is a multicast MAC address?
A MAC address that implies some subset of all devices currently on
115
What is encapsulation replication?
Allows CDP, spanning-tree BPDUs, VTP, DTP, and PagP frames to forwarded along with the normal SPAN traffic.
116
What command causes a VLAN to be created?
vlan
117
What are the motivations for using private VLANs?
Better LAN security and IP subnet conservation
118
What happens when a switch with a higher VTP revision number and in client mode is connected to a network?
The new switch replaces all information in the existing network with its configuration
119
What happens when a switch with a higher VTP revision number and in server mode is connected to a network?
The new switch replaces all information in the existing network with its configuration
120
How many additional bytes of header information is added to frames passing across an 802.1Q trunk
zero
122
trunking will work between the switches?
switchport trunk encapsulation dot1q
124
When configuring trunking on a Cisco router fa0/1 interface, under which configuration modes could the IP address associated with the native VLAN?
Subinterface or physical interface configuration modes
129
d. Is chosen over ISL by DTP
A, C, and D
131
Which command enables PPPoE on the outside Ethernet interface on a Cisco router?
pppoe enable
132
What is a broadcast domain?
A set of devices that receive a broadcast sent by any one of the devices in the same set.
133
What is a VLAN?
An administratively defined subset of switch ports that are in the same broadcast domain. By creating multiple VLANs, the switches create multiple broadcast domains.
134
What is the best practice for VLANs and IPs?
Best practices dictate a one-to-one relationship between VLANs and IP subnets. It is possible to put multiple subnets in one VLAN, and use secondary IP addresses on routers to route between the VLANs and subnets. Also, although not typically done, you can design a network to use one subnet on multiple VLANs, and use routers with proxy ARP enabled to forward traffic between hosts in those VLANs.
135
What are the commands to create a VLAN in VLAN database mode?
vlan database
140
What are the commands to create a VLAN in configuration mode?
(config)# vlan
142
What is a community VLAN?
Hosts within a secondary can communicate with each other and with the primary, but not with another secondary vlan.
143
What is an isolated VLAN?
Any ports associated with an isolated vlan can reach the primary, but not any other secondary. Hosts withn an isolated vlan can't reach each other.
144
What is a promiscuous port?
Ports in the primary VLAN that can send and receive frames with any other port, including ports assigned to secondary VLANs.
145
What are the restrictions and guidelines when configuring private VLANs?
#NAME?
149
Identify the commands to configure and associate VLANs in a private VLAN.
(config)# vtp mode transparent
156
Identify the commands to display the VLANs associated in a private VLAN.
show vlan private-vlan [type]
158
Identify the commands to configure a Layer 2 Interface as a Private-VLAN Host Port
(config)# interface int-id
161
Identify the command to display the Private-VLAN Host Port configuration.
show interfaces [interface-id]switchport
162
Identify the commands to map a secondary VLAN to a primary VLAN Layer 3 VLAN Interface.
(config)# interface vlan pri_vlan_id
164
Identify the command to display the secondary VLAN mapping
show interface private-vlan mapping
165
Identify the commands to monitor Private VLANs
show interfaces status
169
Which VTP modes originate VTP advertisements?
Server and Client modes
170
Which VTP modes process received advertisements
Server and Client modes
171
Which VTP modes forward VTP advertisements?
Server, Client and Transparent modes
172
Which VTP modes save VLAN configuration in NVRAM?
Server and Tansparent modes
173
What is the extended-range VLANs and what VLANS cannot be pruned by VTP versions 1 and 2?
1006-4096 is the extended range
175
Where are normal range VLAN configurations stored?
Server Mode: vlan.dat in Flash
177
Where are extended range VLAN configurations stored?
Server Mode: Nowhere - extended range not allowed
179
How does ISL send frames across a trunk?
ISL adds a new 26-byte header, plus a new trailer encapsulating the original frame. This encapsulating header uses the source address of the device doing the trunking, instead of the source MAC of the original frame.
181
Identify the trunking configuration that always trunks and sends DTP to help other side choose to trunk
switchport mode trunk
182
Identify the trunking configuration that always trunks and does not send DTP messages
switchport mode trunk
184
Identify the trunking configuration that sends DTP messages, and trunks if negotiation succeeds
switchport mode dynamic desirable
186
trunks if negotiation succeeds
switchport mode dynamic auto
187
Identify the trunking configuration never trunks
switchport mode access
189
Identify the command used to associate the VLAN ID to an interface
encapsulation dot1q vlan-id [native]
190
What is 801.1Q-in-Q?
802.1Q-in-Q allows an SP to preserve 802.1Q VLAN tags across a WAN service.
191
What is PPPoE?
Point-to-Point Protocol over Ethernet. A convention often used as the data link protocol over Cable in which Ethernet is used as the data link protocol, but with PPP being encapsulated inside Ethernet. The combination gives the data link features of both Ethernet and PPP, in particular, the ability to forward the layer 2 Ethernet frames to the correct router, plus PPP authentication function of CHAP.
192
What is Layer 2 protocol tunneling?
Another name for 802.1Q-in-Q.
193
What is Common Spanning Tree?
A single instance of STP that is applied to multiple VLANs, typically when using the 802.1Q trunking standard.
194
What is Spanning Tree Protocol?
Defined in IEEE 802.1d, a protocol used on LAN bridges and switches to dynamically define a logical network topology that allows all devices to be reached, but prevents the formation of loops
195
Which STP setting determines how long a nonroot switch waits before trying to choose a new Root Port?
Maxage timer setting on the Root
196
Assume that a nonroot 802.1d switch receives a Hello BPDU with the TCN flag set. Which STP setting determines how long the nonroot switch waits before timing out CAM entries?
When receiving a Hello with TCN set, the non-root switch uses an aggressive time-out value for CAM entries based on the advertised Forward Delay timer on the Root
197
Assume that nonroot SW1 is blocking on a 802.1Q trunk connected to SW2. Both switches are in the same MST region. SW1 ceases to receive Hellos from SW2. What timers have an impact on how long SW1 takes to both become the Designated Port on that link and reach forwarding state?
Hello timer and Forward Delay timer settings on the Root. MST uses RSTP; RSTP waits three times the Hello time, as advertised in the Hello BPDU, before deciding to act.
199
by sending a TCN BPDU. Why the notification is needed?
To trigger the process that causes all switches to use a short timer to help flush the CAM.
200
What are the 802.1w port states
Discarding

CCIE (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions