Hottest Questions This Month

15

votes

3

answers

3k

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Why does one say IP fragmentation is bad and to be avoided when in reality data always needs to be fragmented for MTU compatibility?

modified Apr 1 at 15:43 Barmar 366

8

votes

2

answers

955

views

If TCP packets are pre acknowledged, what happens if packets are dropped?

bandwidth latency

answered Mar 22 at 0:43 Todd 751

6

votes

2

answers

1k

views

Is a point-to-point T1 line literally a line in real life?

network networking internet isp wan

answered yesterday Ricky 27.1k

4

votes

3

answers

418

views

Why eBGP don't need config local-address?

juniper juniper-junos

answered Mar 23 at 5:09 Peter Green 10.5k

2

votes

3

answers

226

views

If router operate at network layer, how does router change data-link header and trailer between data-link header and trailer between LAN and WAN?

routing

modified Apr 3 at 11:26 Zac67 59.2k

5

votes

1

answer

108

views

Vendor Agnostic Network Automation

automation netconf

answered Apr 6 at 9:30 Ron Maupin♦ 87k

0

votes

3

answers

69

views

Why is sometimes a good idea to disable auto-negotiation?

network autonegotiation

modified Mar 20 at 7:36 Zac67 59.2k

0

votes

2

answers

38

views

Do switches send their own extra traffic? [closed]

switch

answered Apr 9 at 13:44 Zac67 59.2k

0

votes

2

answers

58

views

Why are ISPs arranged in hierarchies?

routing switch network internet isp

answered Mar 25 at 20:14 Ricky 27.1k

-1

votes

2

answers

68

views

Why do we need private IP address range?

ip ipv4 nat ip-address rfc

modified Apr 8 at 8:53 Zac67 59.2k

0

votes

2

answers

50

views

Are the IPv4 datagram addresses the corresponding public addresses, or the private addresses?

ipv4

modified yesterday Peter Green 10.5k

5

votes

1

answer

27

views

sFlow configuration tcam question for Cisco Nexus 9396PX platform

cisco network sflow tcam

answered 2 days ago Satish 4,137

1

vote

1

answer

67

views

How to import a file into Junos main config file?

juniper juniper-junos

modified Mar 24 at 2:40 244boy 1,785

2

votes

1

answer

51

views

If SFP supports 4.25Gbps why don't they make a SFP RJ45 2.5Gbps module?

ethernet sfp

modified Apr 3 at 19:53 Zac67 59.2k

1

vote

2

answers

83

views

How TCP sequence numbers work in bidirectional communication/sliding window?

tcp network transport-protocol

modified Apr 1 at 9:58 Ferrybig 103

0

votes

2

answers

39

views

What are the benefits of using a transport label in L3VPN?

mpls tunnel l3vpn

answered Apr 12 at 16:44 Jeff Wheeler 4,326

3

votes

1

answer

61

views

What does it mean when default route is to a network address?

cisco routing default-gateway

modified 2 days ago Jesse P. 2,893

1

vote

1

answer

73

views

Is ICMP protocol widely used in real world?

icmp

modified Mar 30 at 18:54 Ron Maupin♦ 87k

0

votes

1

answer

52

views

How does STP attack work?

networking spanning-tree

modified Mar 24 at 10:16 Zac67 59.2k

0

votes

1

answer

38

views

How does a device receive default gateway IP address?

ip ipv4 dhcp ipv6 gateway

modified yesterday Ron Maupin♦ 87k

1

vote

3

answers

48

views

Why does a queue of a network device like router starts to fill up if the arrival rate equals the transmission rate of the outbound link?

router networking network-core

answered Mar 29 at 14:01 Max N 1

0

votes

1

answer

59

views

How is the maximum speed of an ethernet cable detected?

ethernet autonegotiation

modified Mar 22 at 16:11 Zac67 59.2k

1

vote

1

answer

75

views

Slow SMB transfer rates with client direct to Cisco switch, normal when connected to a downstream Netgear switch

tcp throughput

answered Apr 12 at 18:29 januszb 21

1

vote

2

answers

56

views

Why the iBGP's loopback network is not valid in AS?

bgp networking

modified Mar 25 at 17:21 Ron Trunk 57.4k

0

votes

1

answer

54

views

Plant Network Setup

design dnat

modified Apr 7 at 15:07 Zac67 59.2k

0

votes

2

answers

40

views

IP Snooping\ARP Inspection With Static Devices On DHCP VLAN

dhcp arp dhcp-snooping

answered 20 hours ago JukEboX 367

0

votes

1

answer

51

views

Cannot Create Subinterface on C3650 L3 Switch

cisco-catalyst layer3

modified Apr 8 at 15:11 Zac67 59.2k

-1

votes

2

answers

38

views

Broadcast over all internet

broadcast

answered Mar 31 at 17:08 Ron Trunk 57.4k

0

votes

2

answers

37

views

How do machines setup a route in a network?

network networking internet dns

answered Apr 8 at 20:21 Zac67 59.2k

0

votes

1

answer

47

views

What would happen if I connect VLAN aware NICs via a hub?

vlan

modified Apr 13 at 4:44 Zac67 59.2k

0

votes

3

answers

44

views

BGP-OSPF route injection doesn't work

cisco routing bgp ospf

modified Apr 8 at 5:23 Thomas G. Lau 516

0

votes

3

answers

34

views

Does duplex depend on the cable or the interface?

switch ethernet duplex

answered Apr 8 at 20:03 Jorell Winslow 1

0

votes

1

answer

41

views

can two devices communicate without physical layer?

mac-address layer1 ppp

modified yesterday Zac67 59.2k

0

votes

3

answers

41

views

If router is a layer 3 device how can it have an application interface (GUI)?

layer1 layer3

answered Apr 10 at 22:47 Ron Trunk 57.4k

1

vote

1

answer

40

views

Why the iBGP received network is not valid?

bgp networking

modified Mar 24 at 22:25 Jesse P. 2,893

0

votes

1

answer

40

views

What are the differences between root primary and secondary?

networking spanning-tree

modified Mar 26 at 11:38 Zac67 59.2k

0

votes

2

answers

40

views

Help understanding NAT/PAT - With example

nat

modified Apr 2 at 16:42 Zac67 59.2k

2

votes

1

answer

31

views

What is difference between Route object and AS-SET object in RIRs?

routing routing-registry

answered Apr 1 at 14:02 Jeff Wheeler 4,326

0

votes

2

answers

51

views

Bandwidth guarantees in packet switching networks

bandwidth

modified Mar 29 at 14:41 Max N 1

2

votes

1

answer

29

views

Difference beetween MTU, ipv4 MTU and mpls MTU

cisco mtu

modified Apr 9 at 21:01 Jesse P. 2,893

1

vote

1

answer

36

views

What is the equivalent of “ethernet frames” for satellite communications?

udp

answered Apr 3 at 14:50 Zac67 59.2k

-1

votes

2

answers

28

views

How does the computer detect the routers Around? [closed]

router modem

answered Mar 25 at 14:03 Ron Maupin♦ 87k

0

votes

1

answer

58

views

OSPF with 2 Routers, N redundant links

vlan ospf redundancy

modified Apr 12 at 15:35 Zac67 59.2k

0

votes

1

answer

27

views

Why is my assignment asking me use 172.16.0.0 private addressing and IPv4 sub netted Class C address Scheme?

ipv4 subnet

answered Apr 3 at 3:24 Gordon Davisson 196

0

votes

1

answer

26

views

What does “inline” mean in the context of cable testing?

cable power-over-ethernet testing

answered Mar 20 at 6:21 Teun Vink♦ 14.8k

1

vote

1

answer

33

views

Is it possible to configure Cisco ASR901 as a layer 2 VLAN switch?

switch vlan networking

answered Apr 6 at 9:40 Ron Maupin♦ 87k

0

votes

2

answers

32

views

What are the ways to force all network traffic to pass through a device?

route

modified Mar 23 at 21:51 Zac67 59.2k

1

vote

1

answer

31

views

Are there any advantages of using a crossover cable to directly connect modern devices?

ethernet layer1 cable

modified Mar 28 at 23:41 Ron Maupin♦ 87k

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