Conectei no hot spot do trabalho e executei os comandos:
sudo lshw -C network
[sudo] password for ed:
*-network
description: Ethernet interface
product: 88E8039 PCI-E Fast Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:05:00.0
logical name: eth0
version: 14
serial: 00:16:d3:f5:bd:0b
capacity: 100MB/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.25 firmware=N/A latency=0 link=no multicast=yes port=twisted pair
resources: irq:28 memory:f4200000-f4203fff ioport:3000(size=256)
*-network
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:07:00.0
logical name: wlan0
version: 02
serial: 00:1c:bf:11:8a:3a
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl3945 ip=10.5.50.52 latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:31 memory:f4300000-f4300fff
*-network DISABLED
description: Ethernet interface
physical id: 3
logical name: vboxnet0
serial: 0a:00:27:00:00:00
capabilities: ethernet physical
configuration: broadcast=yes multicast=yes
ed@Note:~$ iwconfig wlan0
wlan0 IEEE 802.11abg ESSID:"Panamerica Park Free WiFi"
Mode:Managed Frequency:2.447 GHz Access Point: 00:15:6D:64:1C:3B
Bit Rate=18 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=26/70 Signal level=-84 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Aqui os problemas com download e streaming não acontecem.